Issues creating a new calendar view
Issue: The 'Calendar View' lacks the functionality to create a new calendar by clicking the Plus button next to 'Activity Types'.
I have tested this on a demo where the issue was present.
This problem has been previously mentioned on the forum https://discussions.vtiger.com/discussion/201823/issues-creating-a-new-calendar-view#latest and might be related to #1763.
Solution: Upon investigation, the problem seems relatively simple to resolve.
There is an AJAX call to 'checkDuplicateView', which returns true if the view already exists and false otherwise. The issue lies in the JavaScript code expecting a true value in the 'success' variable to proceed with Calendar View creation.
Modifying this behavior resolves the problem.