Symptoms

Every time I try to start the WF, I get the following error on the step that's creating a SharePoint folder using the SharePoint Documents wizard.

Server was unable to process request. ---> This operation can only be performed on a file "https:///MYURL]/sites/Dev//MyList]/8/6 error - test 5 8/MYDATE]" " is a folder. ---> This operation can only be performed on a file "https://{MYURL]/sites/Dev/MyList]//8/6 error - test 5 8//MYDATE]" is a folder.
 

Diagnoses

The issue is related to having an illegal character in the name of the folder.
 

Resolution

The issue was resolved when we changed the name to not contain illegal characters. The / character is an illegal character. I recommended using a rule to check if there are illegal characters in the name, and send a warning if there is.