Can anyone help me remove these errors?
The best way to get fast and good help is to provide the kicad project in question. Use Kicad main manager–>File–>archive project and attach the created zip-file.
note: As you are a new user, you are not allowed to attach anything (forum anti-spam measures). Please read New Member Information and follow the instructions. This will promote you to basic user level and allow you to attach projects / pictures / videos.