Cannot delete it. Back-end error

It seemed to be a simple and good plugin, but…

Trying to delete it I faced with a back-end problem:

“Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method brozzme_scroll_top::uninstall() cannot be called statically”

I have to run the wordpress back-up to get rid of the error.
Sad but true 🙁