Fatal error with rdf_entity/rdf_taxonomy

[davidjguru]

Hi, I'm working with OpenEuropa and I have the whole system build and installed (drupal-site-template, all the contrib modules of oe_*, four containers (web, database, sparq, selenium), docker, docker-compose, etc.
All seems working fine, but I have a problem in some sections... For me, the problem begins with a click on Content / RDF listing:

Then, Drupal crashed and gives:

"The website encountered an unexpected error. Please try again later.
TypeError: Return value of Drupal\rdf_entity\RdfGraphHandler::getEntityTypeGraphUris() must be of the type array, null returned in Drupal\rdf_entity\RdfGraphHandler->getEntityTypeGraphUris() (line 164 of modules/contrib/rdf_entity/src/RdfGraphHandler.php)."

Come back and go to admin/reports/dblog and seems just a problem with a module called “rdf_entity” :

Ok, I'm going to see the family of RDF Entity:

And when click in the Rdf Taxonomy module for install it, I received the next PHP Fatal error:

Any idea? Must I write a patch and commit it?
Greetings,

David.

[yenyasinn]

RDF taxonomy module can not be enabled due to error message:

Fatal error: Class Drupal\rdf_taxonomy\TermRdfStorage contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Drupal\taxonomy\TermStorageInterface::getVocabularyHierarchyType, Drupal\taxonomy\TermStorageInterface::getTermIdsWithPendingRevisions) in /var/www/html/web/modules/contrib/rdf_entity/modules/rdf_taxonomy/src/TermRdfStorage.php on line 17