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Cannot login backed after update form to any higher version


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Hello all,

I'm having an issue with my prestashop I need to update is to, but the problem is, every time when I update (it occurs to every version, not especialy i can't reach the backend. Before my last attempt I first disabled all modules and activated debug-modus and then started the update, but it was without succes. When I trie to acces the backend I see the screens as attached.

Is there someone who has some suggestions for me to solve this problem?

Thank you in advance!





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On 1/19/2019 at 5:02 PM, Daresh said:

I would try to delete contents of var/cache folder. Don't know if it's a problem here, but deleting this cache helped me a few times so far.

I tried, but unfortunately the problem is still thera

On 1/20/2019 at 5:41 PM, Nick57 said:

Hallo Bas,

Did you use CTRL+F5 after the update?

Yes I did, also tested on an other device, but problem is still there :(


Are there other suggestions? I need to update, but it's not possible on this way (I update by using Installatron)

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Hallo Bas,

You have to update inside the Prestashop and not using installatron.

It is called 1click upgrade, if you can't find it, install it and make sure it is updated to latest version., then read all possibilities very carefull and do your upgrade from there.


Edited by Nick57
extra (see edit history)
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Not sure what your environment settings are but check folder file rights, depending on hosting it should be 777/666 or 755/644

Also look in your hosting error_log for the errors.

Check your environment with this script, upload it in your hosting and browse to it with www.yourdomain.com/phppsinfo.php and show here the result.


password and username are prestashop

Edited by Nick57 (see edit history)
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Hi Nick,

sorry for my late answer, but it was a busy week.

Today I changed to PHP7.0 (I know, it's not 7,2, but my hoster currently doesn't offer 7.2) but the update to succeeded.

Thank you for your help, I really appreciate it, I was struggling with it for the last weeks...

Edited by Bas_1981 (see edit history)
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