Modded server problem

[Triactis]

07.06 16:21:03 [Server] Server thread/WARN [FML]: ****************************************

07.06 16:21:03 [Server] Server thread/WARN [FML]: ****************************************

07.06 16:21:03 [Server] Server thread/WARN [FML]: * The API cofhapi|item from source /mods/CoFHCore-1.10.2-4.1.0.156-universal.jar is loaded from an incompatible classloader. THIS WILL NOT WORK!

these are the last 3 lines before the server restarts and then crashes again once reaching this part, removing cofhcore just causes other mods to not load and gives this as the last line before crashing:

* The API CoFHAPI|energy from source /mods/SolarFluxReborn_1.10.2-2.17r.jar is loaded from an incompatible classloader. THIS WILL NOT WORK!

what could fix this problem?

[LexManos]

You have installed bad coremods, stop using coremods.

And update to 1.11.2.

[Triactis]

19 hours ago, LexManos said:

You have installed bad coremods, stop using coremods.

And update to 1.11.2.

important mods in the pack have not yet been updated to 1.11.2, and iv'e tried other versions of cofhcore, what do you mean by stop using coremods?

[LexManos]

Delete the coremods.

And update to 1.11.2