Prestashop: Bug in the page Import

[khouloudbelguith]

Describe the bug
In the BO => Advanced Parameters => Import page, an exception is displayed

To Reproduce
Steps to reproduce the behavior:

1. Go to the BO => Advanced Parameters => Import page

Screenshots

Additionnal information
PrestaShop version: develop
PHP version: 7.1

[marionf]

I will try to reproduce when 1.7.5.x will be merged into develop

[khouloudbelguith]

Hi @marionf,

It is not about this PR #11689?
Thanks!

[marionf]

Right, I didn't see this one !

[matks]

@rokaszygmantas Started on a fix, here's the beginning of my work: https://github.com/matks/PrestaShop/commit/19d6fe19dfc7a73fb9d3d8c2ac87b21aba0de1bf

Looks like merges between branches 1.7.5.x and develop have messed up the Import page. Some files which were updated / renamed were left both in the code (the old version and the new version).