I started a few downloads while seeding some old files I already had with previous releases of Transmission and it went just fine.
For some reason I had to leave the house and couldn't let my computer running so I stopped Transmission.
When I came back I relaunched Transmission and although I had no error message both my uploads and downloads wouldn't start.
I usually don't have "so many" torrents running at the same time. It was just for the test
I tried to pause/restart manually as well as deleting the tracker's list and re-adding it. I also tried to start new torrents but they weren't working as well.
The port I use is open and I have no firewall at all.
Is there something I can do (I thought of deleting the preferences, but I don't want to lose my torrents so I didn't do it) ?
Edit :I forgot to specify those are well seeded torrents on both private and public trackers.