Media

As of Drupal Media module version 2 and 3, there are a lot of modules, contributed or custom which have yet to upgrade its code to complement with Media's major overhaul. Notably, this error I kept encountering with Drupal 7 projects:

Fatal error: Call to undefined function media_include_browser_js() in

To troubleshoot and fix this:

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On a Drupal version 7.5x, error suddenly appears: User warning: The following module is missing from the file system: media_wysiwyg_view_mode

It seems the previous version of Media apparently caused the error of the sub-module going "missing". Updating Media module from previous to latest fixed the issue.

Previous version

Notice: Undefined index: admin/content/file in media_browser_plus_menu_alter() (line 88 of ..\sites\all\modules\media_browser_plus\media_browser_plus.module).