I'm apparently not being clear. Have you done a web search on this error? I believe you have a server issue of some kind with your sandbox code service - that the issue is not qRules, but with the sandbox service on your server. Any form with code published directly to a form library goes into the sandbox. If the processes are not starting / running correctly, you will have issues opening your form in the browser, or it will open & you'll get an error about the "code cannot be run", etc.
Hilary Stoupa
