Hi friends,
As you can see in the picture below, the flow I've created works (no flow checker notification & I've been using it for months).

HOWEVER, for whatever reason, as soon as I add a new action below or parallel to "Run script 2" I can't even save my flow as it just gives the error described in the subject in reference to Run script 2. Even if I don't make ANY changes to that action... The following picture demonstrates this.

Literally all I did was add an email notification!!!!
If anyone could help me, you would save me from pulling my hair out as I was intending to add error handling steps to my flow in any case the scripts fail due to not getting the updated version of the Excel sheet in time. I know how to do it, it just doesn't work for [unknown reason]. Thanks in advance!