When creating a table view of an entity without a Title field, error occurs

This could also be a bug of the module you try to leverage. \Drupal\views\Plugin\views\wizard\WizardPluginBase::defaultDisplayOptions tries to detect which field it could use. If modules give a hint which fields should be chosen:
$default_field = $data['table']['base']['defaults']['field']; it accepts that.

"just" ECK, haha, you made my day. ECK isn't even revisionable

So the 'field' is set by this hunk in EntityViewsData

 if ($label_key = $this->entityType->getKey('label')) {
      if ($data_table) {
        $data[$views_base_table]['table']['base']['defaults'] = [
          'field' => $label_key,
          'table' => $data_table,
        ];
      }
      else {
        $data[$views_base_table]['table']['base']['defaults'] = [
          'field' => $label_key,
        ];
      }
    }

Which is correctly checking that the entity-type has a label key.

The issue is in ECK module that always tells Drupal it has a label field named title.

I'm getting a similar error:

Error: Call to a member function getType() on null in Drupal\views\Plugin\views\field\EntityField->defineOptions() (line 370 of [..]/web/core/modules/views/src/Plugin/views/field/EntityField.php)

Removing the label entity key from the entity type definition if it isn't enabled seems to fix the issue.

I had an issue running drush simple-sitemap:rebuild-queue (drush ssr) for a eck entity related sitemap, resulting in the following error, which was hard to understand:

In Tables.php line 369:

'status' not found

In my case it was not the 'title' but the 'status' field (published => status).

Copy of patch from MR !29 attached, to be used with composer, see "Patches from drupal.org merge request URLs are dangerous?".