DENOGAMES Please contact your ISP to see if they are noticing any issues with your connection.
floodlight1903 I understand the test says your score is good, but with an 82, you're definitely going to have disconnects/lag. I recommend trying the connection troubleshooting steps here. It also couldn't hurt to contact your ISP.
As far as getting stuck on that screen goes, please try what I suggested about using the web/companion app to delete your squads and then create an empty squad.
You can also try deleting the personal saved data. Go to Settings/Storage/System storage/Saved Data. Locate FC 26 and delete the saved data.
It might help to clear the cache and rebuild your database with these instructions.