500 error after installing Office Web Application

After installed Office Web apps and once completed the configuration , i noticed that i was getting error on all the site collections on the farm:

 

Workaround / Solution

<staticContent>
<mimeMap fileExtension=".atomsvc" mimeType="application/atomsvc+xml" />
<remove fileExtension=".svg" />
<mimeMap fileExtension=".svg" mimeType="image/svg+xml" />
</staticContent>
<staticContent/>
</system.webServer>

This is because the web.config file has been changed and we need remove the <staticConent/> with red color.