On my Minecraft server when the wizards are clicked they do not trade, it works fine in singleplayer.

I have tried reinstalling the mod

Do you have any addons?

I removed magic seeds and it's still broken

Yes I have extra spells, Arcane additions and magic seeds for electroblobs wizardry

it's a different mod messing with it and all other trading

Which mod?

This would be useful information for others in the future

I agree with @JacksonpYT , it's a different mod the one that is messing up all the trades, including with other villagers. I have arrived to that conclusion because the trades from Minecraft Comes Alive mod aren't working either, but it seems that these 2 mods aren't the problem

it was from me removing minecraft comes alive

It seems like I have the same problem too but the server and the clients doesn't have MCA. Is there any other conflicting mod that anyone suggest that I remove?

FutureMC had a bug with trading in older versions, if be sure to update if you have it