fix 500 internal server error on magento website

fix 500 internal server error on magento website

Cancelled

Job Description

We get lots of 500 server error on our magento website :
- when we try to access the back office we have to refresh the access page several times before being able to see the dashboard

- when we try to create a new url rewrite rule

- when we save product or a category

- lots of 500 errors on google webmaster tools
...