we‘re trying to install the current version of the Etherpad Lite plugin on a Moodle 3.9.3 server. We‘ve already taken into account that Etherpad Lite 1.8.6 doesn‘t seem to work with Moodle, so we‘re running 1.8.5 on our system.
We have Etherpad running at etherpad.mydomain.tld:9001, and Moodle is running at konf.mydomain.tld. We‘ve checked whether the API key is correct and the cookie domain is setup as .mydomain.tld.
Upon creating an Etherpad activity, we see a while rectangle instead of the Etherpad content. Further investigation reveals that the Iframe does point to the created Etherpad, however the Iframe itself is empty, with no content between the body tags. The API responses on the Etherpad server also seem to indicate that everything is working as intended and that the new pad is actually created.
Navigating to etherpad.mydomain.tld:9001 directly in Firefox or Safari works and allows me to create new pads.
We‘ve tried everything that seemed to be applicable from earlier threads, but have so far come up empty.
Thanks in advance,