WinAPI Internal Server Error After Upgrading to Build 8925 or Higher

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Symptoms

A couple of customers have reported an 'Internal Server Error' when making calls to the Windows Integrated API (WinAPI) after upgrade to build 8925 or Higher.

 

Cause

• Lack of NTFS Permissions. The Passwordstate Folder, and all nested files/folders needs Modify permissions for the account being used on the Passwordstate Application Pool in IIS. This is generally the NETWORK SERVICE account, but could also be a Managed Service Account
• Prior to the upgrade being initiated, Passwordstate was not put in Maintenance Mode - and calls were being made to the API during the upgrade process

 

Resolution

• Manually delete the following files, as the upgrade process was not able to do this:

1. c:\inetpub\passwordstate\winapi\bin\passwordstateapi.dll
2. c:\inetpub\passwordstate\winapi\bin\passwordstateapi.dll.config
3. c:\inetpub\passwordstate\winapi\bin\passwordstateapi.xml