Help with MRC converter suite

macOS and Mac Apps

I'm not sure if this kind of topic is allowed here, and if its not, I sincerely apologize in advance.
However, I'm trying to move all my logins from icloud keychain to 1password, using the tools offered by the Mrc converter suite utility, and no matter what I do, I get errors.

At the moment, I'm running the release candidate of MacOS big sur, 11.0.1.

I've also tried running it under Catalina, and get errors there too.
Can anyone help?