In this post, we will discuss one way to resolve an issue which sometimes we got while opening the SharePoint 2013 site in SharePoint 2013 designer. The error comes as:
The folder name is not valid. See fig for ref.
I have tried the below solution and it worked fine for me. But not sure if the same thing will resolve in all other cases also.
First I was opening using HTTP URL, it was not opening.
When I opened the site using https URL, it worked for me.
Hope this will be helpful.
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