My brother had the same problem.
I connected the TomTom to my account to MyDrive Connect access and it new that the maps were missing.
Took about 45mins and all was back to normal.
Things do happen for one reason or another.
I would download the latest version of MYDrive Connect.
Spoiler: This is the Dutch one but you can switch to the country you need
Just checked with TomTom and you will have to buy new maps.
See link:
Spoiler: Info about maps
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