See the details here
I have sent paid request PM help to @mediaateam and also submitted quote through https://fabrikar.com/quote-request for this issue last week, sadly there is no response from Robbie so far.
Anyone knows how to reach to Hugh for help.
The good news is, that project is allowing us to make many new changes and improvements to Fabrik.
It would be possible to finish implementing it, but not trivial.