Getting error while creating PageLayout using Design Manager

Question

While creating Page Layout using Design Mananger i am getting error "Sorry, something went wrong. An unexpected error has occurred.". I am a site collection Administrator, i have full permission.

 

For Creating Page Layout i am following below steps:

 

Site Settings -> Design manager -> Edit Page Layouts -> Create a Page Layout

 

I am not able to find out the reason.

 

Please let me know how to resolve it.

 

Regards

Abhay