Default Export Fields From Subscribers Are Missing

Hi community,

Today I noticed that the 3 default subscriber's export fields are missing (photo).

Can someone guild me how to restore them back?

And a more tricky question if you can help me, how can I add more fields? For example I want to be able to export subscribers with fields email, first name, last name

thank you in advance

here is the photo of the missing fields

Try to temporary disable all 3rd party addons related with export/import

I disabled one import-export addon i had for shipments but no result.

I tried to uninstall and install addon but still the same problem

Examination on your server is required. Try to contact support team