How to remove Theme in Workshop?

Sasidhara M

Hello,
How to remove Theme in Workshop? This environment is Test system, and orginally Theme was imported from Dev system.

I am not able to remove just by selecting it and Delete from Workshop.

Getting this error: CdrResourceListResulthandler::internalReadAttriubtesToResourceObject: Error, invalid property with id 


Thank you,
Sasi

Sasidhara M

Got Import failure first:

I tried removing the Theme to re-import it, but got the following error.

This is the message I get, where to start the troubleshoot and remove this and re-import.. Import is also failing..not sure the reason.