Could not establish connection to the Collabora Online server [500 internal server error]

ℹ️ Support 📄 Collabora
1

Hello,

I have CODE installed on a VPS with Apache as proxy and NC on another host. But since yesterday I am seeing that Collabora online cannot connect to remote host, while checking further I found that /index.php/apps/richdocuments/ajax/admin.php return 500 internal server error. It’s weird because it was working as normal and suddenly this error was thrown. I have updated CODE, but still no luck.

Payload in network console:

{"status":"error","data":{"message":"Failed to connect to the remote server"}}

Restarting server/docker and reinstalling Collabora online has no effect.

Screenshot_20210127_091612
Screenshot_20210127_091612784×305 26.1 KB

Interestingly I can access loleaflet/dist/admin/admin.html, hosting/capabilities and hosting/discovery and curl -k https://127.0.0.1:9980 return OK.

Here is the Apache config:

<VirtualHost *:443>
    ServerName office.DOMAIN.com:443

    SSLEngine on
    SSLCertificateFile /etc/letsencrypt/live/office.DOMAIN.com/fullchain.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/office.DOMAIN.com/privkey.pem

    SSLProtocol all -SSLv2 -SSLv3
    SSLCipherSuite ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
    SSLHonorCipherOrder on

    # Encoded slashes need to be allowed
    AllowEncodedSlashes NoDecode

    # Container uses a unique non-signed certificate
    SSLProxyEngine On
    SSLProxyVerify None
    SSLProxyCheckPeerCN Off
    SSLProxyCheckPeerName Off

    # https://wiki.ubuntuusers.de/Apache/mod_proxy_html/
    ProxyRequests Off

    # keep the host
    ProxyPreserveHost On

    # static html, js, images, etc. served from loolwsd
    # loleaflet is the client part of LibreOffice Online
    ProxyPass /loleaflet https://127.0.0.1:9980/loleaflet retry=0
    ProxyPassReverse /loleaflet https://127.0.0.1:9980/loleaflet

    # WOPI discovery URL
    ProxyPass /hosting/discovery https://127.0.0.1:9980/hosting/discovery retry=0
    ProxyPassReverse /hosting/discovery https://127.0.0.1:9980/hosting/discovery

    # Main websocket
    ProxyPassMatch "/lool/(.*)/ws$" wss://127.0.0.1:9980/lool/$1/ws nocanon

    # Admin Console websocket
    ProxyPass /lool/adminws wss://127.0.0.1:9980/lool/adminws

    # Download as, Fullscreen presentation and Image upload operations
    ProxyPass /lool https://127.0.0.1:9980/lool
    ProxyPassReverse /lool https://127.0.0.1:9980/lool

    ProxyPass           /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities retry=0
    ProxyPassReverse    /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities
  </VirtualHost>

Docker command:

docker run -t -d -p 127.0.0.1:9980:9980 -e "domain=nextcloud.DOMAIN.com" -e "username=yyy" -e "password=yyyyyyy" --restart always collabora/code

Any idea/clue will be appreciated.
Thanks