Actually, the error message is relatively clear. You are using the wrong version or some of your mods don't match.
I would ask you to share the link to your log here so we can take a closer look.
here! https://mclo.gs/6wsevdN
Posts by Mewdove
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I have a server for the Medieval Minecraft Fabric modpack and ever since today it now says I am not running the same version of the modpack as the server, but i am. When i attempt to connect it gives me the error "Incompatible client! Please use 1.18.2" except I've been using the curseforge launcher for the modpack and it won't launch 1.18.2! the mod version in the server automatically has it as v1.5 except the one in forge is v5. When i changed my version to v1.5 however i got the same error and issue so i'm not sure thats the problem. Also v1.5 with curseforge automatically uses 1.19.2.
Here is a screenshot of the problem (click on image for full thing):