TIBCO Spotfire Web Player is in accessible with error "HTTP Error 500.19 - Internal Server Error" displayed in browser.

TIBCO Spotfire Web Player is in accessible with error "HTTP Error 500.19 - Internal Server Error" displayed in browser.

Description: When attempting to open the TIBCO Spotfire Web Player in a web browser, the Web Player application is not displayed and a "HTTP Error 500.19 - Internal Server Error" is displayed in the browser.

Symptoms: When attempting to open the TIBCO Spotfire Web Player in a web browser, one of the following errors are seen.

Generic Error:
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Server Error

500 - Internal server error.

There is a problem with the resource you are looking for, and it cannot be displayed.
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Detailed Error (seen when accessing the Web Player application from the Web Player server itself. For example from a URL like http://localhost/SpotfireWeb):
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Server Error

Error Summary

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information

Module

IIS Web Core

Notification

BeginRequest

Handler

Not yet determined

Error Code

0x8007000d

Config Error

Configuration file is not well-formed XML

Config File

\\?\C:\Program Files\TIBCO\Spotfire Web Player\6.5.0\webroot\web.config

Requested URL

http://localhost:80/SpotfireWeb/

Physical Path

C:\Program Files\TIBCO\Spotfire Web Player\6.5.0\webroot\

Logon Method

Not yet determined

Logon User

Not yet determined

Config Source 441:

442: \\myWebPlayerServer\Temp\Apples & Oranges

443:

Links and More Information

This error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error. View more information »
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A screenshot of the detailed error message is seen in the attached "HTTP Error 500 - Configuration file is not well-formed XML.png"

Cause: Special characters used in settings in the web.config cause the XML to be invalid. Special characters must be escaped.

Resolution: All special characters used in settings in the web.config must be escaped.

For example, the following file path is invalid and will cause the error described above (even though the path is a valid accessible path it is invalid XML syntax):

<ArrayOfString>
<string>\\myWebPlayer\Temp\Apples & Oranges </ArrayOfString>
The "&" must be escaped with "&" in order for the XML to be valid:

</ArrayOfString>
</string>\\myWebPlayerServer\Temp\Apples & Oranges > & & ' ' " " Reference: XML Syntax: • http://www.w3schools.com/xml/xml_syntax.asp Keywords: allowed file path, AllowedFilePaths, special characters, xml syntax, Configuration file is not well-formed XML, escape, entity reference, reference