My server won't let me run commands


New user
So in permissionEx I have full perms and I am OP but it keeps saying an internal error has occured. I have rebooted the virtual and physcial server a repeated number of times, tried it with no plugins active and with different versions of spigot.

MC Version: 1.12.2
Server Ram: 16GB (DDR4)
CPU: Intel i7 (8700K)
Server hosting: My PC
Bungeecord: No
Modded version: Spigot 1.12.2

My console/log:
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Thank you,

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