Server cant save Reskillable cache

[pxrxnoid]

Hello. I installed the reskillable mod on the server to play with a friend. But every time
when someone hits me, when my armor is full durability and when I get my armor from the grave of corail tombostone, it kicks me from the server and writes such an error in the server console. Could you help me?
The creator of the modpack I'm playing on said the server cannot save the ReSkillable cache. But he does not know how to solve this problem
error.txt