"Item not found." dialog on Apply

[Dreamer]

Every time I change any option and press Apply button, I have this error dialog:

"AIMP

Item not found."

After this option is changed correctly.

I don't want to reset my settings, but I'd like to find, how to remove that dialog, what it could be, some system file, file in some plugin, skin? Any ideas?

[Artem]

What version of player?
What plugins you have installed?

[Dreamer]

V4.60, build 2156, Windows 10 64-bit 1809.

I have many plugins, I tried to remove all temporary and the problem is solved, so it's one of the plugins, need to find which...