Probleme mit dem Modul GoogleMap Blocks

Hallo Zusammen,

ich habe Drupal in der Version 8.8.3 neu aufgesetzt. Zur Anzeige einer Karte soll das Modul GoogleMap Blocks verwendet werden. Die Installation verlief problemlos.
Die Einstellungen unter "/admin/structure/gmap-location/settings" konnten ohne Fehlermeldungen vorgenommen werden.
Erst bei der Hinterlegung des Ortes, der angezeigt werden soll (/admin/structure/addlocation, ergaben sich die folgende Fehlermeldung:

Auf der Website ist ein unvorhergesehener Fehler aufgetreten. Bitte versuchen Sie es später nochmal.

Drupal\Core\Database\IntegrityConstraintViolationException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'latitude' cannot be null: INSERT INTO {google_map_location_list} (lid, location_name, address, latitude, longitude) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4); Array ( [:db_insert_placeholder_0] => [:db_insert_placeholder_1] => Textilreinigung Baumgartner [:db_insert_placeholder_2] =>

Brühlgasse 14 79761 Waldshut-Tiengen

[:db_insert_placeholder_3] => [:db_insert_placeholder_4] => ) in Drupal\Core\Database\Connection->handleQueryException() (line 692 of core\lib\Drupal\Core\Database\Connection.php).
Drupal\Core\Database\Statement->execute(Array, Array) (Line: 634)
Drupal\Core\Database\Connection->query('INSERT INTO {google_map_location_list} (lid, location_name, address, latitude, longitude) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4)', Array, Array) (Line: 357)
Drupal\Core\Database\Driver\mysql\Connection->query('INSERT INTO {google_map_location_list} (lid, location_name, address, latitude, longitude) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4)', Array, Array) (Line: 32)
Drupal\Core\Database\Driver\mysql\Insert->execute() (Line: 86)
Drupal\googlemap_block\Form\AddLocation->submitForm(Array, Object)
call_user_func_array(Array, Array) (Line: 114)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 52)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 591)
Drupal\Core\Form\FormBuilder->processForm('google_map_location_add', Array, Object) (Line: 320)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 91)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 151)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 694)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Ich bin mittlerweile recht ratlos...

Über etwas Hilfe wäre ich aktuell sehr dankbar.

Vielen Dank im Voraus für Eure Rückmeldung.

Beste Grüße

Carsten