Upgrade wizard from 7.2.1 to 7.1.8 patch error

I get the following error when I try to use the upgrade wizard:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

I have the correct server permissions and I have checked all of the logs and I can’t figure out what is going on. Here is my upgradeWizard.log:

Mon, 10 Aug 2015 16:26:15 -0700 [UpgradeWizard] - Upgrade started. At start.php
Mon, 10 Aug 2015 16:26:15 -0700 [UpgradeWizard] - at unlinkUWTempFiles()
Mon, 10 Aug 2015 16:26:15 -0700 [UpgradeWizard] - finished!
Mon, 10 Aug 2015 16:26:15 -0700 [UpgradeWizard] - resetting $_SESSION
Mon, 10 Aug 2015 16:26:20 -0700 [UpgradeWizard] - setting session variables...
Mon, 10 Aug 2015 16:26:20 -0700 [UpgradeWizard] - [At systemCheck.php]
Mon, 10 Aug 2015 16:26:20 -0700 [UpgradeWizard] - Starting file permission check...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Finished file permission check.
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Starting database permissions check...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking CREATE TABLE permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking INSERT INTO permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking UPDATE TABLE permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking SELECT permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking DELETE FROM permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking ALTER TABLE ADD COLUMN permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking ALTER TABLE CHANGE COLUMN permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking ALTER TABLE DROP COLUMN permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Checking DROP TABLE permissions...
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - No permissions errors found!
Mon, 10 Aug 2015 16:26:52 -0700 [UpgradeWizard] - Finished database permissions check.

You cannot go from 7.2.1 to 7.1.8. That is a downgrade and the packages are not built to handle this.

Hi Will,

I’m sorry but I wrote the wrong thing. I’m actually trying to upgrade to 7.2.3 from 7.2.1, not the maintenance patch.

We have found the cause of the upgrade error. It appears the that our max_execution_time of 30 was too low. After setting this to 300, the upgrade checks were completed successfully.