Fix Stalled vBulletin Upgrade

The forum is part-way through a minor vBulletin version-to-version update. The upgrader ran, stopped, and now each refresh simply lands me back on the same step with no progress. Because the board is stuck in this transition state some pages are already locked behind the upgrade script, so I need a clean completion as soon as possible.

It is stuck on enter customer number screen on upgrade page. It reloads the enter customer number page again.

Here is what you will find:
• vBulletin reports the upgrade stopped, not a fatal PHP error.
• Reloading the installer repeats the same step rather than advancing.
• Source and target versions are inside the same major release, so templates and plugins should remain broadly compatible once the process finishes.

What I need from you is a safe, database-aware fix that pushes the upgrade through its remaining steps, verifies table changes, and places the forum back online with no functionality loss. If manual SQL, CLI tools, or rollback of specific upgrade tables are required, please document the touches you make so I can keep an audit trail.

Deliverables
- Successful completion of the vBulletin upgrader with confirmation screenshot
- Verification that the front-end and admin control panel load normally
- Brief summary of the root cause and steps taken so future updates run smoothly

You will have full cPanel, MySQL and FTP access the moment we agree on the best window to work, and I’ll be on standby in case you need a quick backup or configuration tweak.