Hi, could you help – thanks!
By switching to php 8.0 or 8.1 I get three lines of code on top of the page in
the backend.
It says:
Attempt to set headers, but headers were already sent at:
/homepages/39/d17236819/htdocs/CMS2020/modules/LISE/LISE.module.php::147

I have four instances of LISE, all updated.

In the frontend every page where a LISE instance is applied crashes with fatal
error.
I tried everything: refresh installation, setting more php memory, repairing
instances, clearing cache …
So I had to switch back to php 7.4 – but it‘s at the end of life.

Please help
Thanks
Reinhard