Within a multisite I have two sites running on Basel. The first one is setup properly. I exported the Basel theme settings to the othter site and it shows correctly.
However, product pages are completely broken for some reason. They are boxed and without any content.
In addition: I think it has something to do with the Basel Child theme. When I switch on the second site to the regular Basel theme I can view the product page as expected with content.
is there something to take into account regarding the child theme and a wordpress multisite?
Most likely some part of the customization code in the child theme causes the problem. Firs of all, switch to the parent theme and check, do you have a problem, if you do not, try to check the whole code in the customization theme:
Save all the punctions.php separately, then clean all, then add snippet by snippet to detect what part is harmful. As soon as you find, correct or delete this code.