PHP 8.2 is already deprecated in nextcloud, so id needs to be updated. The easy way is to use php-updater.

Installing php-updater

sudo wget -O /usr/local/bin/php-updater https://global-social.net/script/php-updater
sudo chmod +x /usr/local/bin/php-updater

To update 8.2 to 8.3

php-updater 8.2 8.3

Getting the error jq-binary not found, solved by

sudo apt install jq

 

The maximum memory for php in nextcloud need to be changed in:

/etc/php/8.x/fpm/php.ini