How to pass a message from any class to a GUI element in PyQt?

Question

PyQt

Good afternoon. Tell me how to access a GUI thread from any class in PyQt? When I try to access the form element directly, I get QObject::connect: Cannot queue arguments of type 'QTextCursor'
(Make sure 'QTextCursor' is registered using qRegisterMetaType().) . And emit() is only executed in the run() method of the thread I created