Error: could not find paymentrequest_pb2.py. Create it with 'contrib/generate

I built/packaged Electrum 4.5.8, and when I trying running it, I get this:

Code:

[code]Error: could not find paymentrequest_pb2.py. Create it with 'contrib/generate_payreqpb2.sh'

[/code]
How do I fix this? I tried running

Code:

generate_payreqpb2.sh

, but I don’t know if it created any files or put them in the right place. Can someone please explain this?