That was the first thing I tried. I also uninstalled all browser extensions. Unfortunately all without the desired success

I've been using Opera as my default browser since 1997, currently in version:94.0.4606.38. Since the penultimate update, I've had various problems where functions and content are no longer displayed to me on various websites. Among other things, I have an account on the "www.welt.de" page, which entitles me, among other things, to read and write access to the comment area. For a few days now, the comment area of the article you have accessed has been hidden and deactivated, although I am logged in.
Oddly enough, this is only the case for linked text articles. In the case of linked video articles, I have read and write access to the associated comment area.
I uninstalled all browser extensions as a test, but without the desired result.

If I call up the "world" in Chrome or Avast Secure Browser, I don't have the problems described, although the same extensions are installed in both browsers as in Opera.
Can you give me a hint how I can fix this problem, if necessary which settings I have to change?
Many Thanks.