Diagnose 500 Internal Server Error

Please follow following to view error on browser:

IIS > Click into your Site
> Click into your Application folder
> Error Pages
> Edit Feature Settings
> set to: Detailed Errors
> Hit Apply on top right side

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NOTE: Never set TRUE "Enable Server-side Debugging" on production server.

On Internet Explorer, turned off Show friendly HTTP error messages in the Advanced settings.

Print on both sides of paper

If you do not see a double-sided option, it's possible that feature isn't turned on.

1. Choose Start > Devices and Printers (Windows 7).
2. Right-click your printer and choose Printing Preferences.
3. Click Advanced.
4. Expand Document Options > Printer Features.
5. Select the desired options and then choose On from the pop-up menu. If you don't find duplex printing and stapling in the options, then your selected printer doesn’t support those features.
6. Click OK, and then click OK again to exit the dialog box.
HTH