Print from seafile onlyoffice documentserver

Trying to print an opened document from “onlyoffice documentserver” within the web interface is blocked with the following message in the console tab of the chrome developer tools.

Uncaught DOMException: Blocked a frame with origin “https://my-serverFQDN” from accessing a cross-origin frame.
at HTMLIFrameElement.iframePrint.onload (https://my-serverFQDN/onlyofficeds/5.3.4-3//web-apps/apps/documenteditor/main/app.js:55:10495)

which prevent it of printing the document. the only option is to download and save the document and then to print using other tools which is unpleasant a little bit.

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When I try to print using Firefox or Chrome I get different responses. In Firefox the document goes directly to a download as PDF. Chrome acts more like expected. That is, it presents a print dialog and I can go directly to the printer. This seems to be the case with both docx and xlsx documents.

Seafile CE 7.0.4 | Ubuntu 18.04 | Nginx

I think the “onlyoffice documentserver” is protected from access to everyone. I have also try to print the file from the seafile onlyoffice documentserver server using the internet-connected printer HP Designjet T520. The massage is showing that the server is protected. That’s why you can’t able to print this server.