Push operation fails during upload

[Giulzzz]

I've been working on a project for a few years without running into issues. Tonight, for the first time, I got an error when trying to push some changes:

hg push
pushing to https://Giulzzz@bitbucket.org/Giulzzz/leafopticalproperties
http authorization required for https://bitbucket.org/Giulzzz/leafopticalproperties
realm: Bitbucket.org HTTP
user: Giulzzz
password:
searching for changes
sending [=============================================> ] 9027/18054 06s
abort: HTTP Error 403: Forbidden

The repository is 914.5 MB. I believe the limit is at 2GB. Any idea what could cause this?

Thank you,
Giulia