У вашего броузера проблема в совместимости с HTML5
This tutorial shows you how to force https on Cpanel and how to walk through the variety of other simple admin tasks.
1.) Install MS Fonts: # apt install ttf-mscorefonts-installer
2.) Move Fonts into the docker:
a.) Find the docker container number: # docker ps
b.) Move the fonts into Docker: # docker cp msttcorefonts/. {containerID}:/opt/collaboraoffice5.3/share/fonts/truetype/
c.) Verify the Fonts: docker exec -it {containerID} dir /opt/collaboraoffice5.3/share/fonts/truetype/
d.) Reboot: # reboot
3.) Grab the document template from the Nextcloud Install:
/core/templates/filetemplates
4.) Edit the document any way you want, and reupload the file.
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