Hello. Apologies for the delay but as Marc stated there was a bank holiday and I had additional leave around that time too.
I managed to do this by accidentally selecting the wrong folder when setting up the import location. This step in the SEGA guide is really important:
Find the folder the level above the ‘Football Manager 2024 Mobile’ folder you have placed the career folder inside
For example, if your exported save is located at "Documents/Football Manager 2024 Mobile/export_MyCareer" Then your import location should be "Documents/" and the game will then search that folder for the correct 'Football Manager 2024 Mobile' folder. In order to reselect your import location you would have to do a fresh install of the game unfortunately. This is something I'll raise with the team as I think we should improve the user experience for the next version.
Can you try selecting the import folder again and verifying if that fixes the problem or not?