Call to a member function displaySubmitted() on null in template_preprocess_node() of core/modules/node/node.module

Created patch to fix this issue. Kindly review this.

If this problem was discovered on a version of Drupal that is not 11.x, add that information in the issue summary and leave the version at 11.x. In Drupal core changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to the Core change policies → . Also mentioned on the version → section of the list of issue fields documentation.

Un-assigning per Assigning ownership of a Drupal core issue → .

And +1 to #3. The standard issue template should be restored and as many sections as possible completed.

@rahul17 can you add the full issue template back and add some steps to reproduce?

This sounds like you have a record in your node table with a node type that no longer exists