iisnode encountered an error when processing the request.

HRESULT: 0x6d
HTTP status: 500
HTTP subStatus: 1013
HTTP reason: Internal Server Error

You are receiving this HTTP 200 response because system.webServer/iisnode/@devErrorsEnabled configuration setting is 'true'.

In addition to the log of stdout and stderr of the node.exe process, consider using debugging and ETW traces to further diagnose the problem.

The last 64k of the output generated by the node.exe process to stderr is shown below:

[API token log] Unable to append to I:\SiteData\ApiLog; some records were not saved.
[API token log] Log storage unavailable; some records were not saved.
[blueshift] Blueshift.SignupEvent ERROR: Status 401: {"error":"Invalid events api key","status":"unauthorized"}
[blueshift] Blueshift.IdentifyCustomer ERROR: Status 401: {"error":"Invalid events api key","status":"unauthorized"}
[API token log] Unable to append to I:\SiteData\ApiLog; some records were not saved.
[API token log] Unable to append to I:\SiteData\ApiLog; some records were not saved.
[API token log] Unable to append to I:\SiteData\ApiLog; some records were not saved.
[API token log] Log storage unavailable; some records were not saved.