Good day
I am trying to add various fields on PowerAutomate (data that comes from a Microsoft Form), but keep getting the error:
Unable to process template language expressions in action 'SumAll' inputs at line '0' and column '0': 'The template language function 'add' expects two numeric parameters: the first summand as the first parameter and the second summand as the second parameter. The function was invoked with '1' parameter(s).
Here is my flow:

After I have Summed up everything, I need to calculate an Average:

Can you please advise me on the error I'm getting on "SumAll" above?
Thanks