Hello Addenster,
update platform from version 1.2.4 to 1.2.6 Not working i have tried 3 time and got message your platform update, but when i back to admin panel this is not don.
Did you use the FTP user that had enough permissions to write files? What about unzip command? Is it installed on your server? Also you can check the ow_version.xml file in the root folder of your Oxwall installation - is that still 1.2.4?