= New workspaces cannot be started by using a GitHub pull request URL Currently, {prod-short} fails to start new workspaces with a clone of a GitHub-hosted repository when using the `pass:c,a,q[# https://github.com/__<user_or_org>__/__<repository>__/pull/__<pull_request_id>__ ]` URL syntax. The workspace-starting page displays the following error message: *Failed to resolve a devfile. Failed to request factory resolver: Internal Server Error occurred*. .Workaround * Enter the URL of the fork and branch of the pull request: `pass:c,a,q[# https://github.com/__<user_or_org>__/__<repository>__/tree/__<branch_name>__ ]`.

Steps from this document . Example 4. Example - cloning the Plug-in registry repository pull request #1097 . https://che-host#https://github.com/eclipse-che/che-plugin-registry/pull/1097 https://che-host/f?url=https://github.com/eclipse-che/che-plugin-registry/pull/1097