Is the forum ok?

[foss-]

When trying to post a discussion on the forum https://musescore.org/en/node/add/forum shows the following error:

The website encountered an unexpected error. Please try again later.</br></br><em class="placeholder">Drupal\Core\Entity\EntityStorageException</em>: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: &#039;&#039; for column &#039;ip&#039; at row 1: INSERT INTO {ip_posts} (type, id, ip) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2); Array
(
    [:db_insert_placeholder_0] =&gt; node
    [:db_insert_placeholder_1] =&gt; 393349
    [:db_insert_placeholder_2] =&gt; 
)
 in <em class="placeholder">Drupal\Core\Entity\Sql\SqlContentEntityStorage-&gt;save()</em> (line <em class="placeholder">783</em> of <em class="placeholder">core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php</em>).

Is that a known problem?

[foss-]

This issue is persisting. The error has been reduced to now only show The website encountered an unexpected error. Please try again later.

Where would be the correct place to ping someone responsible?