Error 500 after Update

Hello,
I have just run the latest update. If I want to create a new field Error 500 appears.

This page does not work
www.vnv-urbex.de is currently unable to process this request.
HTTP ERROR 500

Warning: require_once(/var/www/virtual/vnv-urbex.de/htdocs/administrator/components/com_myshortlist/assets/mx.joomla.lib.php): failed to open stream: No such file or directory in /var/www/virtual/vnv-urbex.de/htdocs/administrator/components/com_rapidcontactex/views/rapidcontactex/tmpl/form.php on line 33

Fatal error: require_once(): Failed opening required '/var/www/virtual/vnv-urbex.de/htdocs/administrator/components/com_myshortlist/assets/mx.joomla.lib.php' (include_path='.:/usr/share/php71/lib/php') in /var/www/virtual/vnv-urbex.de/htdocs/administrator/components/com_rapidcontactex/views/rapidcontactex/tmpl/form.php on line 33

Hello Rene.
Thank you for posting this.

I have just fixed the issue and released the fix.

Thanks again.

Thanks for the quick answer and the fix. But it still does not work in the frontend.

Thank you

Hi again Rene. It seems that the latest update contained two breaking errors.
I am sorry for this. We are working on improving the front-end layout, so that it can allow for template overrides.
I have just released the fix.