Robyn 3.12 fails if all paid media vars are different from paid media spends

[ONalivajko]

Robyn 3.12 fails if all paid media vars are different from paid media spends

Describe issue

The new exposure-based modelling in Robyn 3.12 fails when all paid media vars are different from paid media spends, i.e. each paid media variable has separate spend and exposure data.

Provide reproducible example

I ran the modelling with the demo file, leaving only facebook and paid search variables as they have both spend and exposure

Failure happens when Robyn tries to export general plot in the directory (generate one-pagers):

Outputs get generated partly (no one-pagers and model-specific files)

If at least ONE paid media var is the same as its corresponding paid media spend, the modelling doesn't fail.
That explains why this problem doesn't pop up with the demo file - since only facebook and search have different spend and exposure values whereas for tv, ooh and print the spend values are used as both spend and exposure.

Environment & Robyn version

Robyn version: ['3.12.0.9003']
R version: 4.4.2