Screenshot of Error Message: 



Reason:


There is a feature in eZee Frontdesk, whereby we can allocate inventory business source wise and the inventory is defined, the system will not allow booking rooms beyond the allocated inventory.


Solution: 


Deactivate this feature in eZee Frontdesk.


Path: eZee Frontdesk Configuration >> Advance Settings >> Rental >> (Uncheck) Enable Business source wise room type allocation. 


Refer screenshot.