I recently had the same issue with my Canonet. Although a completely different camera the issue might be similar.
The problem I had was the film wasn't tight enough around the take up spool. It would advance the film but at around 20 exposures the film would get too wide to move inside the chamber.
I tried to pull out a bit of film from a canister and roll it up tight enough for it to curl. When advancing the film carefully I would put some resistance on the rewind lever for the film to properly tighten around the spool inside the camera when advancing the film. I'm not sure whats not working properly yet as this is a recent issue but this works for now.