entity type does not exist

This seems to be due to $bundle_entity_type = $this->entityTypeManager->getDefinition($entity_type)->get('bundle_entity_type') in TaxonomySetLineageForm returning NULL.

This subsequently causes the next line : $entity_bundle = $this->entityTypeManager->getStorage($bundle_entity_type)->load($bundle_id); to fail.

For now, I fixed it locally by adding an IF-statement around it.
Basically, replace this block of code:

        $bundle_entity_type = $this->entityTypeManager->getDefinition($entity_type)->get('bundle_entity_type');
        $entity_bundle = $this->entityTypeManager->getStorage($bundle_entity_type)->load($bundle_id);
        $options_bundles[$bundle_id] = $entity_label . ' - ' . $entity_bundle->label();

        $options_fields[$instance->id()] = $instance->label() . ' <small>(' . $instance->id() . ')</small>';

with:

        if ($bundle_entity_type = $this->entityTypeManager->getDefinition($entity_type)->get('bundle_entity_type')) {
          $entity_bundle = $this->entityTypeManager->getStorage($bundle_entity_type)->load($bundle_id);
          $options_bundles[$bundle_id] = $entity_label . ' - ' . $entity_bundle->label();

          $options_fields[$instance->id()] = $instance->label() . ' <small>(' . $instance->id() . ')</small>';
        }

I do seem to have some other - likely unrelated - issues with the module, but at least that will grant you access to the configuration form.

Could not reproduce on a almost fresh D10 instance. Could it be possible that you have some field that is not attach to any bundle, or maybe a custom entity without bundles, or any specific case ?

@maintainers : do you want me to provide a patch with additional checks for NULL variables ?

I have resolved the issue & added patch, please review.

You're patch seems OK but there's one issue regarding coding standards. Please add a space before the opening brackets of your if condition.

Update the previous #5 🐛 entity type does not exist Needs work patch!

thanks!

Patch #7 is working. Thanks.