Hey @Ghinlis and everyone, GOOD NEWS! The issue regarding the game crashing during International Matches in Player Career has been resolved, and the fix will be made live soon to not only new saves but existing saves too! There's not a precise time yet as to when the fix will come, but it will come!
"It happens when you have an international match on the last match of the season and unfortunately you can’t control when the matches will be played. It’s a matter of luck based on which group you’ll play in the tournament."
@Longlijer69 and @Afiih, Regarding the renewing your contract issue that's still affecting you both, both your issues and circumstances have been looked at. They're currently still working on the issue, and hope they're able "to kill two birds in one stone in the fix". If this isn't the case, it should be resolved after.
If anyone else is still affected and isn't able to Renew their Contract, please upload a screenshot and write what season you're in.