RTC workspace folder creation

I am getting an error while creating repository workspace folder.

It is taking only one folder path in advance setting and when I am creating workspace in some other folder, it does not create it.

How would you resolve this?

It is taking only one folder path in advance setting

That means you are no longer in the "repo workspace creation" step: you have created it (and you should see it in the "my repository workspaces" section).
You create loading your repo workspace into a local workspace or sandbox. That is the step which requires to specify a local folder (on your computer) in the "advanced setting" section.

Simply make sure that the folder (and its full path) you are entering in that setting is:

• not an existing one. For instance: C:\a\b\c\d means that d must not exist yet: RTC will create it when loading the sandbox. C:\a\b\c must exist.
• isn't in folder already used as a sandbox: if you see a .jazz5 folder in any of the parent folder you want, meaning in the aforementioned example in C:\a, C:\a\b or C:\a\b\c, you cannot use those parent folders to load a sandbox in d.
  A sandbox is a folder with a .jazz5 in it (local cache), and you cannot nest sandboxes.