Import content using the "Default Content for D8" module

I am using Default Content for D8 to import content on my site.

After Profile installation completed, I enabled my custom default content module with contents sample json for node entity [my_module/content/[entity_type]/anything.json].

I get the following error:

SymfonyComponentSerializerExceptionUnexpectedValueException: Type
/drupal-pro-8/rest/type/node/article does not
correspond to an entity on this site. in
DrupalhalNormalizerContentEntityNormalizer->getTypedDataIds() (line
239 of
drupal-pro-8coremoduleshalsrcNormalizerContentEntityNormalizer.php).

And the node isn’t imported…

What have I done to try to fix it:

. Ensure I have the article content type;

. Flushed all cache;

. Tested in different browsers;

. In the module page it says all tests were passed with the following conditions: PHP 5.5 & MySQL 5.5, D8.5 6. I started to use the same version of PHP, MySQL and D8.

After all this, the same problem keeps on appearing and I can’t understand why this happens. May I missed something. Any help.

Thanks in advance.