Suspect File Versions
 

<div>Upgraded yesterday to 3.8.4 got a white screen when using any of the moderating drop down options under a thread. so

<div style="margin:20px; margin-top:5px; "> Quote:
So I uploaded vbulletin files making sure to upload them in ASCII format and overwrite the ones on the server. Also be sure to upload the admincp files to whichever directory you have set in your config.php file. Then run 'Suspect File Versions' in Diagnostics to make sure you have all the original files for your version and that none show 'File does not contain expected contents':

Admin CP -> Maintenance -> Diagnostics -> Suspect File Versions

[Note: In some cases you may also need to remove any of the listed .xml files in the includes/xml directory.]

Next, disable all plugins.

Note: To temporarily disable the plugin system, edit config.php and add this line right under