1-click upgrade: "Javascript error (parseJSON) - Upgrade from 1.6.0.5 -> 1.6.0.14

[Barama]

I am using version 1.6.0.5 and I wanted to upgrade to the latest version(1.6.0.14). I tried to use the automatic upgrader(1-Click Upgrade). But I always get the error:

 

"Javascript error (parseJSON) detected for action "upgradeNow". Starting restoration...".

 

For hours I am trying to find a solution. I tried many suggestions.

 

- I read the documentation: http://doc.prestashop.com/display/PS16/Automatic+update

- I uninstalled and reintalled 1-Click Upgrade ( I am using version 1.4.9)

- I tried to upgrade through local folder

- Set the modules directory and all subdirectories permissions to 777

 

But all to no avail.

 

The error gets explicitly mentioned in the documentation. But the mentioned code is already commented out in my code base. Mysql, Mysqli, Pdo, Sqlite are all enabled.

 

I do not know what to do anymore. I want to avoid a manual upgrade if possible. I hope that somebody has a solution or an idea.

[bsm]

have you solved this problem? I'm having similar now

[FutureForce]

same problem here try to update from 1.6.0.11 to 1.6.0.5.15 get same error.

 

please help

[tuk66]

Can you see that wrong JSON in browser console?

 

ajaxProcessUpgradeNow() in AdminSelfUpgrade.php is "very first step of the upgrade process. The only thing done is the selection of the next step", so it must be something fatal.