With a forced upgrade of my provider from PHP 7.4 to PHP 8.1  miniflux v1  did not work anymore with Reeder 5. After trying to  correct all issues with phan, I decided to switch to a freshRSS install that has even a more modern Google API.

BTW I find it quite helpful to debug PHP 7.4 code by intentional throwing a javascript error to block any ongoing action with

throw "SimulatedException"

and setting PHP more verbose with

error_reporting(E_ALL | E_STRICT)

While it was quite straightforward to replace all “each” with “for each”, or “read_exif_date” with “exif_read_date” the main issue were unquoted “$_SERVER” variables and functions that need to be checked for missing variables

$rows= (is_countable($ret) ? count($ret) : 0

The biggest problems came by Nextcloud update to version 25. It turns out that there is a file limit of 262.144 of my internet provider.

Any Nextcloud update always needs about 30.000 files. Whenever it encounters any other error, a restart produces  another 30.000 files, basically killing my account.

In contrast to the documentation the issue is also not at the root nextcloud updater directory but in the data directory.