I use crafty controller with playit to host. I've tried putting in the IP and Port of the UDP tunnel I use on playit, but the mod says that it isn't installed in the server when it is.

I'll test it over the weekend if that's alright with you. I'm unable to do so at the moment.

There's quite a bit but here you go.

https://mclo.gs/y4JJPiy

Is Plasmo Voice the only mod installed? If not, please send the mod list.

I wasn't able to reproduce the issue, but found a possible cause.
Can you try the latest build of this version?
https://github.com/plasmoapp/plasmo-voice/releases/tag/2.1.5-SNAPSHOT