Problem analysing project - quick assistance apprechiated

[ShiriKD]

My dougers wrote the following project and they need it to be evaluated for a school activity by end of day today. I tried assisting them in changing names, etc, but still the project analysing returns an error with no explenations.

Do you know what might be causing it?
https://scratch.mit.edu/projects/220140731

Thanks a lot

[mkotsovoulou]

I am also facing the same problem with these three projects:
https://scratch.mit.edu/projects/200588776/
https://scratch.mit.edu/projects/230637203/
https://scratch.mit.edu/projects/230637643/
https://scratch.mit.edu/projects/199438041/

I checked for duplicate sprite names...

Thanks a lot!