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Magento and 500 Internal server error

we recently begun working on a web shop whose owner wanted color swatch option for her store. We felt very lucky that Magento CE 1.9.1 came with that functionality. So we upgraded store from to But as usual, Magento upgrade didn’t go without problems. After the upgrading was finish, we coldn’t open the store. All we saw was a blank screen with 500 Internal server error displayed.

We tried making a downgrade back to and then again upgrade to As soon as we downgraded the store it was working normally. But the minute we upgraded it, it again displayed error 500. This only ment that there was something wrong with Magento installation. After looking at the server logs, we found out the problem – permissions on index.php. The permissions on index.php were set to 664 meaning the group was able to write to the file. The minute we changed the permissions on index.php to 644 the store was working again.

Hope this helps 🙂

By Iva Korlevic

I'm a web programmer that started working with web pages in 2008 by programming simple HTML/CSS webpages. I finished Faculty of electrical engineering in April 2010 and started working in Inchoo in May 2010. During the time in Inchoo I worked on Zend applications, Magento stores and a few Wordpress projects. I left Inchoo in January 2012 and worked for a couple of months in Gauss Informatika as Zend teacher and team leader. In May 2012 I left Gauss Informatika and joined the team at NTH Media. For next 6 months I worked on various mobile and Wordpress projects. In the February 2013 together with MArin Blazevic I opened Proodos. I'm still continuing my work as Zend and Magento programmer.
In summer 2015 I also started to work for Webbite Media GMBH and on 19th August 2015 I passed Magento Certification Exam and am now Magento Certified Developer.

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