DONT HAVE PERMISSION ON EXCEL

I TRY TO SAVE A NEW FILE BUT IT HAPPENED TO "YOU DONT HAVE A PERMISSION".

I AM USING MACBOOK AIR 2020.

FYI, IVE SIGN IN MY EXCEL ACCOUNT ON ANOTHER DEVICE TOO (MACBOOK AIR 2015, BUT IT CAN SAVE A FILE)

IVE TRIED WITH MANY WAYS :

1. GET INFO > READ & WRITE
2. SYSTEM SETTING > FULL DISK ACCESS ; BUT DIDNT HAVE THE TICK BOX FOR MICROSOT EXCEL
3. SECURITY & PRIVACY

MAYBE YOU COULD SUGGEST ANY ANOTHER SOLUTION FOR ME. THANKYOU.