There is now GUI when press "k".

It's like the menu is appeared but there are no elements in it. I've tried to reinstall, but no result.
What I have to do?

What other mods do you have with AutoFish?

I've tried several times to turn off all of them, but there is no result. May it be the in using TLauncher?

I've tried it now, turned all the mods off, and now Minecraft just goes out. Interesting fact that with other mods I can load it and try to open the GUI, turn on\off some options like rod switching etc., but without mods it doesn't start at all.

Some crash logs, if it helps.

I believe this is a version problem. Although the mod is marked to be working on 1.16.x, I actually only tested it on 1.16.5.
Upgrading Minecraft version to 1.16.5 should fix the problem, but I will still leave this open.