Call to a member function getFileUri() on null

Problem/Motivation

Using version 1.0-alpha with the AJAXRatingLink plugin, there is an error on front end:

Error: Call to a member function getFileUri() on null in Drupal\flag_rating\Plugin\ActionLink\AJAXactionLinkRating->getIcon() (line 54 of modules/contrib/flag_rating/src/Plugin/ActionLink/AJAXactionLinkRating.php).

Proposed resolution

Fix this error.

Remaining tasks

• Create a separated function to load the Icon
• Use this function in the admin edit form
• Use this function in the ActionLink render array

User interface changes

None

API changes

None

Data model changes

None