Because the classes get converted to an array, most of the themes are throwing this notice when rendering such links:
Notice: Array to string conversion in Drupal\Core\Template\AttributeArray->__toString() (line 73 of core/lib/Drupal/Core/Template/AttributeArray.php).
Drupal\Core\Template\AttributeArray->__toString() (Line: 53)
Drupal\Core\Template\AttributeValueBase->render() (Line: 289)
Drupal\Core\Template\Attribute->__toString() (Line: 180)
Drupal\Core\Utility\LinkGenerator->generate('Facebook', Object) (Line: 94)
Drupal\Core\Render\Element\Link::preRenderLink(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 490)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 122)
To solve this, the classes should remain a space separated string. I'm going to submit a patch shortly.
Fixed
1.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
I'm still getting this problem with Claro and a sub-theme based on stable9. The patch at #2 addresses the problem.
Not the done thing to re-open a closed issue... so should I raise a new issue?
Stand corrected... patch 2 applied yet error returned 10 minutes later
