In the dev branch there is a possible solution. Another solution is to go to the following path "admin/group/types/manage/GROUP_TYPE" and in the Creator settings section deactivate the option "Group creator must complete their membership".
Hello @AndreaR25, you can use version 1.1.x and later, as it is not available for versions 1.0.x.
Sorry for my English, I was testing the module on a Drupal 9 installation, and I'm seeing the same error you reported @Cangurin cleanups. After quickly reviewing the error, I've realized that the 'l()' function is being used, which is deprecated. Perhaps the following code could be an idea to resolve the error.
NodeController.php::120 file.
use Drupal\Core\Link;
if ($vid != $html_page->getRevisionId()) {
$link = Link::fromTextAndUrl($date, new Url('entity.html_page.revision', [
'html_page' => $html_page->id(),
'html_page_revision' => $vid,
]))->toString();
}
else {
$link = $html_page->toLink($date)->toString();
}
The solution is in DEV until the next release.
Another alternative solution is to go to "admin/structure/types/manage/TYPE_NAME/form-display", edit the field configurations, and save.