"Waxl dyne untherhouze" bug
Sounds like you have malware. Look through your installed apps (from settings) and see if anything sticks out as fake. Uninstall it.

If nothing appears off, then the next step is doing a factory reset. Back up your information first!

If even that doesn't work, call the manufacturer for service. Fixing malware that can survive a factory reset is a very technical and risky process.