Getting error message

Getting error message

I do not know how to program in Deluge, but am following your videos step-by-step. The course is complicated but remarkably easy to follow so far.  However, I am getting an error message: Failed to execute function
  • Invalid collection string Line Number:17
Of course, there is no error on line 17 as all it contains is//.  I have gotten to Video 3, around 35 minutes.  I believe the error may be that I have substituted the incorrect name or field as I am not using the Deal Module but the Contact Module.  How do I get assistance with my problem?  Is there the option to buy some of your time so you can look at what I have done so far?