If that don't work do the following:
1) Turn on debug mode by adding the following to your includes/config.php
Code:
$config['Misc']['debug'] = true;
2) Go to
ACP --> vBulletin Options --> vBulletin Options --> Version Info and Other Untouchables, and change ONLY the setting,
vBulletin Version Number to 3.8.2
3) Turn off debug mode by removing the following to your includes/config.php
Code:
$config['Misc']['debug'] = true;