404 issue when saving changes to a product BO

[Dolke]

Hi guys,

 

I have an issue on the 1.5.4.1 Prestashop when I modify any product from the Back Office and save the changes.

 

Let me explain... 

 

I navigate to a randomly selected product in the BO and add simple character in the long description field.

Then I hit the SAVE button to save the changes.

PS takes about 45 seconds to save the change but instead of prompting me that change was successful,

it redirects me to a front end on a 404 page displaying this: http://prntscr.com/68sxsc

we are on the VPS and php settings are set to quite high values.

What seems to be the problem?
 

[Dolke]

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