Mod List:
server-1.20.1-20230612.114412-srg.jar |Minecraft |minecraft |1.20.1 |NONE |Manifest: NOSIGNATURE
forge-1.20.1-47.0.19-universal.jar |Forge |forge |47.0.19 |NONE |Manifest: 84:ce:76:e8:45:35:e4:0e:63:86:df:47:59:80:0f:67:6c:c1:5f:6e:5f:4d:b3:54:47:1a:9f:7f:ed:5e:f2:90[07:48:07] [main/ERROR] [minecraft/Main]: Failed to start the minecraft server
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
Mod §esophisticatedbackpacks§r requires §6sophisticatedcore§r §o1.20.1-0.5.62 or above§r
§7Currently, §6sophisticatedcore§r§7 is §o§nnot installed
]
at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:149) ~[fmlcore-1.20.1-47.0.19.jar%23108!/:?] {}
at net.minecraftforge.server.loading.ServerModLoader.load(ServerModLoader.java:32) ~[forge-1.20.1-47.0.19-universal.jar%23112!/:?] {re:classloading}
at net.minecraft.server.Main.main(Main.java:125) ~[server-1.20.1-20230612.114412-srg.jar%23107!/:?] {re:classloading}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}

You need to add sophisticatedcore as well, which is exactly what this message tells you, it's shown as required dependency in backpacks download and mod launchers will do this for your automatically.

Thank you very much, I solved it.