MYOB Assist App issues

Good Morning

After using the new app for a while it has now stopped working with no issues logging in.

Then a few weeks ago, I was unable to login and it doesn't take you to the original login page.

It goes to a homepage and no matter where i try to login in it doesn't work.

App has been deleted multiple times and reinstalled.

iPhone software updated.

Please advise on how to fix this.

Thanks