I upgraded to 23 last week and things looked fine, browsing the web interface worked nicely.
But then I noticed all actual file operations fail. I have a raw install of nextcloud on a ubuntu server, behing a nginx reverse proxy on a different server. Looking at the apache log on the server running nextcloud shows:
172.16.69.11 - - [15/May/2022:15:45:36 +1000] "GET /nextcloud/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json&path=%2FEnrolment+Form.pdf&reshares=true HTTP/1.0" 200 824 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0"
172.16.69.11 - - [15/May/2022:15:45:35 +1000] "GET /nextcloud/ocs/v2.php/apps/activity/api/v2/activity/filter?format=json&object_type=files&object_id=86099 HTTP/1.0" 304 249 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0"
172.16.69.11 - - [15/May/2022:15:45:37 +1000] "GET /nextcloud/ocs/v2.php/apps/files_sharing/api/v1/shares?format=json&path=%2FEnrolment+Form.pdf&shared_with_me=true HTTP/1.0" 200 824 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0"
172.16.69.11 - - [15/May/2022:15:45:40 +1000] "GET /nextcloud/ocs/v2.php/apps/files_sharing/api/v1/sharees_recommended?format=json&itemType=file HTTP/1.0" 200 922 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0"
172.16.69.11 - - [15/May/2022:15:45:37 +1000] "GET /nextcloud/remote.php/dav/files/LovesTha/Enrolment%20Form.pdf HTTP/1.0" 503 16017 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0"
That log is from me trying to open a pdf document in the web interface.
Every request under /nextcloud/remote.php/dav/ fails where requests under /nextcloud/ocs/v2.php/ are fine.
Any clues.
Best guess is a reverse proxy issue, but those paths look good to me. As the files look to be in those relative paths in the installation:
./ocs/v2.php
root@server /v/w/nextcloud# find . -name remote.php
./apps/dav/appinfo/v2/remote.php
./remote.php```