Fancy insert stopped working
The issue is caused by the insert module. The latest version (1.4) switched from using click to mousedown events, in this issue https://www.drupal.org/node/2295507

The patch submitted here (https://www.drupal.org/project/fancy_insert/issues/2955599#comment-12571625) should solve your issue, it basically switches from triggering click to triggering mousedown events as a way to connect to the insert module's functionality.

Here is the code change for reference:

diff --git a/fancy_insert.js b/fancy_insert.js
index 8325c96..0b99824 100644
--- a/fancy_insert.js
+++ b/fancy_insert.js
@@ -21,7 +21,7 @@ Drupal.behaviors.fancy_insert = {
-            $(this).parent().next().find(".insert-button").trigger("click");
+            $(this).parent().next().find(".insert-button").trigger("mousedown");


Good luck!