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Sorry to hear you’re facing problems 
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Nextcloud version (eg, 20.0.5): 22.2.3
Operating system and version (eg, Ubuntu 20.04): debian 10
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.38 behind nginx reverse proxy
PHP version (eg, 7.4): 7.3.31-1
The issue you are facing:
Is this the first time you’ve seen this error? Y:
Steps to replicate it:
- Run sync on linux Nextcloud Desktop Client. Seems like any file over 1MB fails with a “413 Payload Too Large” error. I am able to upload larger files via the browser inteface and via the mobile app. This only seems to happen with the Desktop client.
The DNS for this server is hosted by CloudFlare and uses the proxy option. On the server, Nextcloud sits behind an NGINX reverse proxy. We did disable the Cloudflare proxy to see if this was the cause, but that did not make a diffence.