Additions 1.5.6 [Forge 1.19.2 / 1.19.4 / 1.20.1 / NeoForge 1.20.4 / 1.20.6 / 1.21.1]

unzip it, if you're using neoforge 1.21.1 then duplicate the neoforge 1.20.6 and rename it to neoforge 1.21.1, then in the plugin.json just add 2024003 to the supported versions list and zip it back up (make sure u select all the files instead of the folder!), i cant guarantee it will work but you can try i havent tested it

I already added it.

Removing effects has not been implemented so far.

You can in fact do it but only using a custom code snippet. I hope sumeshi implements that into a block cause it's really useful to have, but yeah can be manged using something like this:
entity.removeEffect(mobeffectinstance.getEffect());
I've tested this out and does work, but in some cases effects that deal damage over time (Like poison) Get removed but you still keep taking poison damage, that's what happened to me while testing but could be a problem on my specific code and the triggers I use. Hope this helps!

Try downloading the plugin again.

I don't have any plans to support it so far.

Set silent to true