Still don't see it. Try saving it as a txt file and then attaching it. If that doesn't work, private message me.

or zip it up, then attach

OK. I'm trying both tactics. There should be two files attached here. A zip and a txt.

There might be an issue with using email as username. Will investigate further.

I've found the problem. It's some kind of a conflict w/ a Content Builder Data Storage that I had defined. When I delete that definition, all runs well.
Sorry to have taken your time. [Actually, trying to describe the problem to you gave me the clarity to look in the right place for the solution ]
Thanks again for your prompt response and attention.
Best regards,
BCC