Issue #3474361 by mferanda: AIDmi button conflicting with link

js/aidmi_ckeditor.js

@@ -65,8 +65,11 @@ let aidmiEditedText;
                 existingButton.focus();
               }
               altTextField = mutation.target;
+              // Check if the alternative text form exists.
+              altTextForm = document.querySelector('.ck-text-alternative-form');
+              // Get the selected image.
               imgTag = aidmiActiveEditorInstance.data.stringify(aidmiActiveEditorInstance.model.getSelectedContent(aidmiActiveEditorInstance.model.document.selection));
-              if (altTextField) {
+              if ((altTextForm) && (altTextField) && (imgTag)) {
                 aidmiButton(altTextField, aidmiActiveEditorInstance, imgTag);
               }
             }