Can somebody please advise what this error refers to: Starting MxRuntime failed. at com.mendix.core.MxRuntime.y(SourceFile:243) Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: User role name should not be null No where do we have a null user role.
null is terminology for 'nothing, void, empty'. Either you have a user / administrator without role, or no roles at all in your model. When in doubt, starting with an empty database probably solves the issue.