Website 403 error

Hello,
This problem has already been shared 8 months ago (https://musescore.org/en/node/298845) but it still belongs there.
Today i upload many scores (39) in a few time, and the problem appeared on the 40th. While the sheet was upload at 100% the "Publish" button didn't work, so i was forced to quit the page. I since the moment i quit the uploading page, i can't access to my profil, search for sheets, upload: i have a 403 error (access denied) ... But i still can access to the others page.
And now the same problem appeared on my smartphone while i'm not connected to my account.

Thanks to the team ;)