The " Sequel::SQL::Blob" stuff seems to be Ruby-related, those are the only hits I get when I google it. Are you pulling task data out of the database directly?
Anyway… I think that’s unrelated to the pulp task failing. It’s hard to read due to the truncation though.
@JamesV21 or @tomzellner, could you try to fin an un-mutilated version of the traceback? Perhaps looking at the task record via pulp task details --href /pulp/api/v3/tasks/929b44b3-0b56-4254-a4ed-669348ac6c81/? If you have the pulp-cli package installed.