Install 18.104.22.168 from 22.214.171.124
When I try to check for updates I get this error message:
Warning: Cannot modify header information - headers already sent by (output started at /home/admin/domains/vemglobal.net/public_html/sawtelle/updates/concrete126.96.36.199/concrete/controllers/dashboard/system/backup_restore/update.php:57) in /home/admin/domains/vemglobal.net/public_html/sawtelle/updates/concrete188.8.131.52/concrete/libraries/controller.php on line 356
When I try to download 6.3.3 again I get this error message:
The directory /home/admin/domains/vemglobal.net/public_html/sawtelle/updates/concrete184.108.40.206 already exists. Perhaps this item has already been installed.
I just ran into this issue when updating a client's website. I did not look for the reasons why this happens but I can tell you how to fix it though:
1- Download 220.127.116.11 from concrete5.org
2- Unzip the archive you downloaded
3- Browse your website's files to the updates folder and create a directory called "concrete18.104.22.168"
4- From the unzipped archived copy the concrete folder concrete22.214.171.124 folder created in the previous step
5- Log in to your website and go to Systems and Settings / Update Concrete5.
You will now have the option to upgrade to either 126.96.36.199 or 188.8.131.52 ( choose 184.108.40.206 )
This worked for me at least :)