HTTP Error 500.19 – Internal Server Error
Description of HRESULT
The requested page cannot be accessed because the related configuration data for the page is invalid.
This error is particularly prevalent for newly installed servers because:
There’s a fairly good chance you’re missing the correct VC++ runtime for the version of PHP you’re running.
If you’re running PHP 5.5.x you need to ensure the VC++11 runtime is installed:
Make sure you download and install the x86 version (vcredist_x86.exe), PHP on Windows isn’t 64 bit yet.
If you’re running PHP 5.4.x then you need to install the VC++9 runtime:
Many thanks to Sepehr for help with this.