Hi Ernest,
both did not work 🙁
This was already in the config.php:
define('WP_HOME','https://haushaltsfee.org');
define('WP_SITEURL','https://haushaltsfee.org');
And the addition of code in the functions.php made no difference.
But thanks for the hint regarding the base URL, I will ask my server admin.
I will let you now…
Thx,
Karsten