J3.x:Can't edit modules after update to 3.6.3

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In some cases the backend module edit doesn't work or shows a white screen.

Errors reported

Users see a white screen when editing a module in the backend (see: https://github.com/joomla/joomla-cms/issues/12456).

Versions affected

General Information

This pertains only to Joomla! version(s): 3.6.3

What is the cause

We have changed some JS Code and your browser is still using the old version which no longer works.

How to fix

To be sure clear your Browsercache and your Joomla! cache.