I’m sorry to confirm, that after lots of upgrades and fresh installations, the problem is due to telesign extension, so if you have installed it, forget to upgrade to 1.3.0.
Also uninstalling extension doesn’t solve the problem.
You must do a fresh installation from zero, but before that, check carefully that your hosting fully supports magento. I honestly recommend a VPS. Don’t waste your time installing in a shared account, if you plan to go live.