External calendar creation fails

[verement]

When I attempt to add an external calendar, after clicking “Save” a new page briefly shows a notice at the bottom that says “Calendar successfully created!” but the top of the page shows an error message (“Oooops... It looks like you may have taken the wrong turn”): “Missing required parameters: id”.

There is no log message in the HumHub logs, and the external calendar does not in fact appear to be created.

HumHub version: 1.5.1
External Calendar version: 1.1.8

[verement]

After some additional diagnosis, it appears the problem occurs when data validation of the new external calendar fails.

ExternalCalendar has a surprising maximum title length of 15 characters. There is no check at ICalSync.php:90 to see whether the call to save the calendar model fails.

[UtmostCreator]

I believe it was fixed before (by @buddh4), I have also added some validation if something is wrong.
#16

[buddh4]

Yes is fixed and max title length was increased