murallitz Hi
It looks like the issue comes from specific browser such as Chrome browser as it removed this API:
libjs.min.js?2.0.0:3 [Deprecation] Listener added for a 'DOMNodeInserted' mutation event. Support for this event type has been removed, and this event will no longer be fired.
Please backup this file: /plugins/system/jabuilder/helper.php
Edit the line 325 to:
$link = 'index.php?Itemid=' . $params->get('aliasoptions', '0');
Then edit page again with another browser.