pleas some one help! nether wont turn hard

[djp69]

hey i have a problem with my healthbar not working properly and i cant set the nether to hard, and its stuck on peaceful. i tried typing /difficulty hard. and i tried typing /execute in minecraft nether: run difficulty hard 

what can i do to fix it? 

has it somthin to do with my plugins? i have ultimate timber and veinminer on.

[Ben87]

We also see this quite a bit. It does appear to not work for some users no matter what they try but I know if they change it on the panel they have to wait a few minutes for the changes to save and restart their server. To change it in-game they have to have OP and surprising that is the cause for a majority of issues.

I would personally suggest make sure the server is offline then change it, or get the multiverse plugin and set it with that.

[djp69]

but it used to work before and if i whold instal the lultiverse plugin what im i suposed to do next?