Loading takes very long… with text documents


I am using the nextcloud app on my android phone. There is an option to create new text documents. If I try to edit the files, the rotating circle is displayed. Later the message “Loading takes very long…” is displayed.

How is it possible to edit text documents from the nextcloud app?

The problem is solved

I use my own CA-Authority. When the CA-Certificate is installed in the Android-certificate-store it works.

I have confirmed the warning message when logging in. It seems that is not enough.