Missing loads of textures when I installed Subaquatic, Fluidlogged, and assetmover (and only those 3 mods). Any help is appreciated.

Subaquatic-v1.2.1-mc1.12.2.jar
Fluidlogged-API-v2.2.7-mc1.12.2.jar
assetmover-2.5.jar

Details:
Minecraft Version: 1.12.2
Operating System: Mac OS X (x86_64) version 10.15.7
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 10360892256 bytes (9880 MB) / 10569646080 bytes (10080 MB) up to 10569646080 bytes (10080 MB)
JVM Flags: 8 total; -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M -Xms10064m -Xmx10064m
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
Loaded coremods (and transformers):
Fluidlogged API Plugin (Fluidlogged-API-v2.2.7-mc1.12.2.jar)
git.jbredwards.fluidlogged_api.mod.asm.ASMHandler$Transformer
git.jbredwards.fluidlogged_api.mod.asm.transformers.TransformerLevelProperty
git.jbredwards.fluidlogged_api.mod.asm.transformers.TransformerSmoothWater
Subaquatic Plugin (Subaquatic-v1.2.1-mc1.12.2.jar)
git.jbredwards.subaquatic.mod.asm.ASMHandler$Transformer
AssetMover (assetmover-2.5.jar)

GL info: ' Vendor: 'ATI Technologies Inc.' Version: '2.1 ATI-3.10.23' Renderer: 'AMD Radeon Pro 5700 XT OpenGL Engine'

[13:59:38] [Client thread/INFO] [FML]: MinecraftForge v14.23.5.2860 Initialized
[13:59:38] [Client thread/INFO] [FML]: Starts to replace vanilla recipe ingredients with ore ingredients.
[13:59:38] [Client thread/INFO] [FML]: Invalid recipe found with multiple oredict ingredients in the same ingredient...
[13:59:38] [Client thread/INFO] [FML]: Replaced 1227 ore ingredients
[13:59:38] [Client thread/INFO] [FML]: Searching /Users/myname/Library/Application Support/minecraftModdedInstances/_BiomesTestNoOTG/minecraft/mods for mods
[13:59:39] [Client thread/INFO] [FML]: Forge Mod Loader has identified 7 mods to load
[13:59:39] [Client thread/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge, assetmover, fluidlogged_api, subaquatic] at CLIENT
[13:59:39] [Client thread/INFO] [FML]: Attempting connection with missing mods [minecraft, mcp, FML, forge, assetmover, fluidlogged_api, subaquatic] at SERVER
[13:59:39] [Client thread/INFO] [Subaquatic]: Reading vanilla assets required by this mod...
[13:59:40] [Client thread/FATAL] [AssetMover]: Unexpected error occurred while downloading versions manifest
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) ~[?:1.8.0_74]
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949) ~[?:1.8.0_74]
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) ~[?:1.8.0_74]
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) ~[?:1.8.0_74]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509) ~[?:1.8.0_74]
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) ~[?:1.8.0_74]
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979) ~[?:1.8.0_74]
at sun.security.ssl.Handshaker.process_record(Handshaker.java:914) ~[?:1.8.0_74]
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062) ~[?:1.8.0_74]
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375) ~[?:1.8.0_74]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403) ~[?:1.8.0_74]
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387) ~[?:1.8.0_74]
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559) ~[?:1.8.0_74]
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185) ~[?:1.8.0_74]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513) ~[?:1.8.0_74]
at sun.net.www.protocol.http.HttpURLConnection.access$200(HttpURLConnection.java:90) ~[?:1.8.0_74]
at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1433) ~[?:1.8.0_74]
at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1431) ~[?:1.8.0_74]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_74]
at java.security.AccessController.doPrivilegedWithCombiner(AccessController.java:782) ~[?:1.8.0_74]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1430) ~[?:1.8.0_74]
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254) ~[?:1.8.0_74]
at com.cleanroommc.assetmover.AssetMoverHelper.getVersionJson(AssetMoverHelper.java:130) [AssetMoverHelper.class:?]
at com.cleanroommc.assetmover.AssetMoverHelper.fromMinecraftVersion(AssetMoverHelper.java:68) [AssetMoverHelper.class:?]
at com.cleanroommc.assetmover.AssetMoverAPI.fromMinecraft(AssetMoverAPI.java:33) [AssetMoverAPI.class:?]
at git.jbredwards.subaquatic.mod.Subaquatic.constructClient(Subaquatic.java:107) [Subaquatic.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:637) [FMLModContainer.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) [guava-21.0.jar:?]
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) [guava-21.0.jar:?]
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) [guava-21.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:217) [guava-21.0.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) [LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) [LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) [guava-21.0.jar:?]
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) [guava-21.0.jar:?]
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) [guava-21.0.jar:?]
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) [guava-21.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:217) [guava-21.0.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136) [LoadController.class:?]
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:595) [Loader.class:?]
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:232) [FMLClientHandler.class:?]
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467) [bib.class:?]
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378) [bib.class:?]
at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) [NewLaunch.jar:?]
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) [NewLaunch.jar:?]
at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) [NewLaunch.jar:?]
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387) ~[?:1.8.0_74]
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) ~[?:1.8.0_74]
at sun.security.validator.Validator.validate(Validator.java:260) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) ~[?:1.8.0_74]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ~[?:1.8.0_74]
... 65 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) ~[?:1.8.0_74]
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) ~[?:1.8.0_74]
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) ~[?:1.8.0_74]
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ~[?:1.8.0_74]
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) ~[?:1.8.0_74]
at sun.security.validator.Validator.validate(Validator.java:260) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) ~[?:1.8.0_74]
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) ~[?:1.8.0_74]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491) ~[?:1.8.0_74]
... 65 more

THANK YOU. Will use. Couldn't figure out why it was working in another modpack.

No problem!

Update your Java or use loliasm and other mods to fix outdated Java certificates.