Hi

1. almostunified-forge-1.20.1-0.9.4.jar
2. aether-1.20.1-1.5.1-neoforge.jar
3. ancient_aether-0.9.8.jar
4. lmft-1.0.4+1.20.1-forge.jar

[15:15:06] [Worker-ResourceReload-12/ERROR] [minecraft/TagLoader]: Couldn't read tag list ancient_aether:has_structure/holystone_ruin from ancient_aether:tags/worldgen/biome/has_structure/holystone_ruin.json in data pack builtin/compatibility/deep_aether
2775 | java.lang.RuntimeException: No key values in MapLike[{"remove":["deep_aether:golden_grove"]}]
2776 | at com.mojang.serialization.DataResult.lambda$getOrThrow$5(DataResult.java:101) ~[datafixerupper-6.0.8.jar%23107!/:?] {re:mixin}
2777 | at com.mojang.datafixers.util.Either$Right.map(Either.java:99) ~[datafixerupper-6.0.8.jar%23107!/:?] {}
2778 | at com.mojang.serialization.DataResult.getOrThrow(DataResult.java:93) ~[datafixerupper-6.0.8.jar%23107!/:?] {re:mixin}
2779 | at net.minecraft.tags.TagLoader.m_144495_(TagLoader.java:53) ~[client-1.20.1-20230612.114412-srg.jar%23910!/:?] {re:mixin,pl:accesstransformer:B,pl:connector_pre_launch:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:almostunified-common.mixins.json:runtime.TagLoaderMixin from mod almostunified,pl:mixin:APP:connectormod.mixins.json:TagLoaderMixin from mod connectormod,pl:mixin:APP:lmft.mixins.json:TagGroupLoaderMixin from mod lmft,pl:mixin:APP:kubejs-common.mixins.json:TagLoaderMixin from mod kubejs,pl:mixin:A,pl:connector_pre_launch:A}
2780 | at net.minecraft.tags.TagLoader.m_203900_(TagLoader.java:114) ~[client-1.20.1-20230612.114412-srg.jar%23910!/:?] {re:mixin,pl:accesstransformer:B,pl:connector_pre_launch:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:almostunified-common.mixins.json:runtime.TagLoaderMixin from mod almostunified,pl:mixin:APP:connectormod.mixins.json:TagLoaderMixin from mod connectormod,pl:mixin:APP:lmft.mixins.json:TagGroupLoaderMixin from mod lmft,pl:mixin:APP:kubejs-common.mixins.json:TagLoaderMixin from mod kubejs,pl:mixin:A,pl:connector_pre_launch:A}
2781 | at net.minecraft.tags.TagManager.m_203920_(TagManager.java:55) ~[client-1.20.1-20230612.114412-srg.jar%23910!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:A,pl:connector_pre_launch:A}
2782 | at java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source) ~[?:?] {}
2783 | at java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source) ~[?:?] {}
2784 | at java.util.concurrent.ForkJoinTask.doExec(Unknown Source) ~[?:?] {}
2785 | at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source) ~[?:?] {}
2786 | at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source) ~[?:?] {re:mixin,re:computing_frames}
2787 | at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source) ~[?:?] {re:mixin}

Fixed in 0.9.9