[SQ4 B2] Can´t set floating point weight in "Weightes Fitness (multiple goals)"

In SQ 3.8.1 I have always been using my own fitness function. I am trying to replicate this in SQ 4 B2 as well and for that, I would need to assign a weight of "0.2" to "Profit Factors" (this was no problem in SQ 3.8.1). Trying to do this in SQ4 B2, it tells me that the value must be a "number" and afterward jumps to "undefined" for the weight, leaving no way to change it back at all anymore. It says as "undefined", whatever I try.

Please make it possible to use floating point values for the weights, like it was possible in SQ 3.8.1 and fix the "undefined" problem too.

Thank you :)