Guys 😔 I need help 

I have an old db and wanted to add a field. I am in Edit mode, but I can't see the menu to add fields....

If I create a new table, then I get the message

 I tried to import the db... may formulas do not replicate.

I tried to make a backup and then import (in the cloud): message: synch error

I'm sorry fir the stupid question...