Project description: cannot use CKeditor and cannot see content

Hello,

I installed first time Projeqtor V9.4.1 yesterday on Debian.
It works well. Afterthem, I set LDAP up and it works very well.
The only one is, if I want to add a description in a project, I are not able to get an Editor.
(I changed the settings to TextEditor, but I cannot use the description field.)

Please see screenshot.

In Firfox, the editor is present and useable. Also the content is visible.
In Edge, the entered content is not visible and I also cannot enter new content.

How can I solve this issue? Thank you.

 

To use IE mode is not an option, but I tried. In IE mode it's not possible to edit the project or create a new one.

After that, I opened the private browser mode from Edge (no addon) but the same result, there is no editor visible. Does the editor anything will download from the internet? Maybe companies firewall will block something?

I found a JS error, maybe this is a language setting issue.

I use German / Japanese as languages/

(Please see screenshot)

I changed to English and the error is gone. But the CKeditor is still available.
There is a button to change the field with CKeditor into full screen. When I click the icon, I can see some JS errors.

If you could please check the screenshot. Thank you again.