Modpack not working after update polytone

[jolly phoenix]

My modpack that I use for survival world with many mods and adventures, I update it a lot, apparently polytone released an update and I applied it and it stopped working. I leave all possible important logs and for now I will continue using the version I had of polytone (a previous version to the one they recently released).

and mojang launcher said this: "The game crashed: initializing game
Error: java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'frozenlib' at 'net.frozenblock.lib.FrozenLibClient'!"

[chilly lion]

from the log it doesnt say its crashing

you sure its the right log?

[jolly phoenix]

umm i changed to polytone last version and crash but logs don't said nothing

i send it now with the crash assistant

Minecraft crashed. The logs have been uploaded to gnomebot.dev:

latest.log | crash-2025-05-20_19.19.44-client.txt | rei.log | crash_assistant_app.log | modlist.txt

Mod list changes beyond the latest successful launch:

Updated mods:
polytone (1.21.4-3.3.13 > 1.21.4-3.3.16)

The game crashed: initializing game
Error: java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'flashback' at 'com.moulberry.flashback.Flashback'!

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Although removing flashback will remain the same lol

if i remove flashback now said is other mod lmao:

The game crashed: initializing game
Error: java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'frozenlib' at 'net.frozenblock.lib.FrozenLibClient'!