Unable to login & access to Nextcloud server 21 from both iOS app and iOS web browsers

Nextcloud version 21.
Operating system and version: Ubuntu server 20.04 LTS
PHP version 7.4
Nextcloud/Apache instance behind nginx reverse proxy
Installation made by Daniel Hansson (Hansson IT) nextcloud provider.


  1. I can’t access (https://cloud.mydomain.com/) from Safari on my Mac.
    Error message: "Safari cannot open the page. Safari cannot open ‘https://cloud.mydomain.com/’. The error is: “cannot parse response” (NSURLErrorDomain:-1017)

However, I can login and access from any other browser (Edge & Chrome)

  1. Tests performed on iPhone (iOS 14):
    (A) I cannot access to https://cloud.mydomain.com/ directly in any browser (Chrome, Edge and Safari).
    e.g. in Chrome the error message received was: “cannot access to this webpage. It is possible that [https://cloud.mydomain.com] is temporarily inactive or be moved to another address. ERR_INVALID_RESPONSE"

(B) Cannot login and access using Nextcloud iOS app. Error: “Connection error
The answer cannot be analyzed”

All suggestions are welcome. Thanks in advance

Did so solved your problem? I have the same.

I think it’s a problem related with HTTP/2. It works without.

I had the same issue. I solved it by adding the following line in the nginx reverse proxy config:

proxy_hide_header Upgrade;

After that listen 443 ssl http2; still working for iOS :slight_smile:

1 Like

Thanks for sharing, this helped fixed the problem for me as well!