My application won't share

My application won't share

I can no longer share my zoho creator application. I only share this application with one other person and the other person can no longer log into it. It shows the application, but has a message that says "You are not authorised to access this form in Zoho Creator. Go to Home".

I tried to deleting them and resharing, but that didn't work either. Any help would be appreciated.
tarter.k