nextcloud onlyoffice fails to load
after a lengthy delay, nextcloud onlyoffice fails to load a document with a small error message on the top-right saying:
ONLYOFFICE cannot be reached. Please contact admin
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there is, in particular, a XHR request that fails after 60+ seconds to a cleartext URL:
so something seems wrong with the server here...
i tried to flush the cache in my browser, no luck. tried in a private session and a different browser in a clean profile, no luck either, so this is not a caching issue.