My customer has a problem with blocks in a Commerce installation with Drupal 8.9.19 hosted on a shared hosting with Linux. Suddently the configuration of the block looks strange.
It isn't possible to configure the node type, the page on which the block should be displayed, the roles, and all the information that we can normally configure in blocks.
This comes after installing some modules and a Drupal core update.
What is going wrong?