Hi,
there are two things - based on my experiences. My NextCloud is hosted at all-inkl.
-
set php memory limit to 512M by editing .htaccess file:
php_value memory_limit 512M -
delete old update leftovers which are placed in data directory. In my case this disturbing folder was called: [updater-oco7ek3xolkq]
Just delete this folder and you are ready to run the updater.
Please feel free to share with us whether is worked for you as well.
Take care and stay healthy