Unable to connect to the server (HTTP Error 500). Possible causes: 1) The Web server may not have Microsoft SharePoint Foundation ...

Unable to connect to the server (HTTP Error 500).

Possible causes:
1) The Web server may not have Microsoft SharePoint Foundation installed.
2) If you are connecting through a proxy server, the Web server name may be incorrect, or the Web server may not be running on the specified port.
3) An internal error may have occurred in the Web server, preventing Microsoft SharePoint Foundation from processing this request.

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