Problems with signing in to Sketch Cloud

Hello everyone. I have a problem with signing in to Sketch Cloud. When I try to sign in it returns an error “error”. Error appears on Lunacy 5.3.1. Please, fix this error!

EDIT: Error appears only when I try signing in with right password. When i write wrong pass, than change to valid, it allows me to sign in

Hello, is it a one-time issue, or does it happen all the time since you’ve started using the v.5.3.1 of the app?
Is the issue present now?

It appears all the time, and issue still exists