Joplin on IOS with Nextcloud Fails To Sync (windows works)

Using Joplin Windows Desktop 1.14

Latest Joplin IOS App 2020.10.05

NextCloud Version 16.0.3.0

I have mirrored precisely the information that synch's perfectly in Windows 10. However it says Error. Please check that URL username, password etc... are correct

What sayeth the group?

Thanks.

Jay