Hi,
thanks for the reply. I tried php 7.1 too but run into the same error.
I asked the question on GitHub and was directed to a ticket which looks similar
https://github.com/PrestaShop/PrestaShop/issues/10198#issuecomment-459264788
However I had already rolled back to a previous backup from 1.5 months ago - and I am glad that everything works - at least somehow.
As I have to pay extended support for an outdated php version I changed to 7.3 and it works (probably also with 7.2 ) but I stayed with 7.3 since I was more than happy to have the functionality back.
Nevertheless I am still getting strange messages in the developers console and an invalid token messsage appears when I open the product page in the BackOffice.
I lost a bit of confidence in the overall stability of my Prestashop. Probably I have to upgrade to the newest version ....but this will be another adventure I assume.
Many thanks
Klinki
