When connecting to Onlyoffice "Timeout conversion error"

Just installed Nextcloud and Onlyoffice but have hit a brick wall trying to connect them.

Here is what I am running:
Nextcloud 18.0.4
Onlyoffice-documentserver 5.5.1
PHP 7.3
Debian 10 (Bullseye)
No SSL configured and no reverse proxy. The browser connecting straight to Apache hosting next cloud and a direct connection on the same server hosting Onlyoffice.

Nextcloud loads fine.
I get the “Document Server is running” page from Onlyoffice.

When I attempt to connect to onlyoffice I get:

Nothing in error logs on Onlyoffice, however out.log has:

Blockquote
[DEBUG] nodeJS - healthCheck start
[DEBUG] nodeJS - [AMQP] connected
[DEBUG] nodeJS - [AMQP] conn close
[DEBUG] nodeJS - healthCheck end
[DEBUG] nodeJS - checkJwt success: docId = commandFromServer decoded = {“payload”:{“c”:“version”}}
[DEBUG] nodeJS - Start commandFromServer: docId = undefined c = version
[DEBUG] nodeJS - End commandFromServer: docId = undefined {“error”:0,“version”:“5.5.1.76”}
[DEBUG] nodeJS - checkJwt success: docId = convertRequest decoded = {“payload”:{“async”:false,“url”:“http://cloud.mydomain.com:8082/index.php/apps/onlyoffice/empty?doc=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJhY3Rpb24iOiJlbXB0eSJ9.HO8yVThljmrKFAiXsGoWMtnWnjfNFj-idymye3GiplM",“outputtype”:“docx”,“filetype”:“docx”,“title”:“check_1393096271.docx”,“key”:"check_1393096271”}}
[DEBUG] nodeJS - Start convert request docId = conv_check_1393096271_docx
[DEBUG] nodeJS - Start receiveTask: docId = conv_check_1393096271_docx {“cmd”:{“withAuthorization”:true,“c”:“conv”,“id”:“conv_check_1393096271_docx”,“format”:“docx”,“url”:“http://cloud.mydomain.com:8082/index.php/apps/onlyoffice/empty?doc=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJhY3Rpb24iOiJlbXB0eSJ9.HO8yVThljmrKFAiXsGoWMtnWnjfNFj-idymye3GiplM",“title”:“check_1393096271.docx”,“outputformat”:65,“outputpath”:“output.docx”,“codepage”:46,“delimiter”:4,“embeddedfonts”:false,“status_info”:0,"nobase64”:true}}
[DEBUG] nodeJS - End receiveTask: docId = conv_check_1393096271_docx
[DEBUG] nodeJS - End convert request end true url http://cloud.mydomain.com:8081/cache/files/conv_check_1393096271_docx/output.docx/check_1393096271.docx?md5=gp-EW2APnoj9Cl68Zn99XQ&expires=1588116794&disposition=attachment&filename=check_1393096271.docx status -83 docId = conv_check_1393096271_docx
[DEBUG] nodeJS - checkDocumentExpire start
[DEBUG] nodeJS - checkDocumentExpire end: startSaveCount = 0, removedCount = 0
[DEBUG] nodeJS - expireDoc connections.length = 0
[DEBUG] nodeJS - expireDoc connections.length = 0
[DEBUG] nodeJS - checkDocumentExpire start
[DEBUG] nodeJS - checkDocumentExpire end: startSaveCount = 0, removedCount = 0

I have attempted to connect with IP, by domain as well as setting “Document Editing Service address” to localhost / IP. The error seems to be the same.

Not sure if the issue is on Onlyoffice side or Nextcloud. Some assistance would be appreciated.