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Sorry to hear you’re facing problems 
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 26.0.3.2
Operating system and version (eg, Ubuntu 20.04): NextcloudPi RaspberryPI
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.56 Debian
PHP version (eg, 7.4): 8.2.1
The issue you are facing:
To a newly created ncp instance I restored from a back.tar file of previous ncp instance - which had nextcloud 20.0.2 - and it down graded back to 20.0.2 which was incompatible with the version of php - it wanted 7.4 and i had 8.2.1 - and when I set the system to run with php7.4 it still did not work - I got unauthorized
Is this the first time you’ve seen this error? (Y/N):
No
I want to know before I am going through the whole thing again - if i restore from a .tar will it downgrade to the nextcloud 20.0.2 ?