Description: Mod loading failures have occurred; consult the issue messages for more details

net.neoforged.neoforge.logging.CrashReportExtender$ModLoadingCrashException: Mod loading has failed

I updated my modpack today and sophisiticated storage is not happy. I just uploaded the latest version on modrinth for 7 minutes ago and still not working.

sophisticatedstorage-1.21.1-1.5.0.1254.jar

crash-2025-09-01_08.59.59-fml.txt

in that crash log I can see version 1.21.1-1.5.0.1254 of Sophisticated Storage, but there's this newer one as well https://modrinth.com/mod/sophisticated-storage/version/1.21.1-1.5.1.1260

You need to update SophisticatedStorage to latest version as well. there was a change in core that required changes to both backpacks and storage and thus they both had new builds

I did I had all three updated using the modrinth launcher... I just troubleshooted and reverted to older versions.

Thank you I updated my server today and it is working great! <3