KB233476: "Second factor authentication failed" error message appears when logging in with Standard Authentication in MicroStrategy Web 9.5.0

SUMMARY:
This issue has been classified as a defect by Strategy.  The impact is limited to Strategy 9.5.0 product when setting Standard Authentication for the first time. A workaround is available in the current document. A solution/code fix for this issue is not available in current releases but is being reviewed for a future Strategy release.
 
SYMPTOM:
After installing 9.5.0 and setting the authentication for Strategy Web 9.5.0 to be Standard Authentication, all the users except for the Administrator get the following error message, even if Strategy Usher has not been defined to be used as an authentication method.

The Web Server encountered an unknown runtime error.
(Second Authentication failed)

• In the Strategy Web 9.5.0 Web Admin page > Default properties, define the Login mode as Standard, like shown below.

• Under the Server Properties, make sure that the Strategy Usher configuration has not been setup, like shown below:

• Connect the Strategy Web 9.5.0 server to a Strategy Intelligence Server 9.5.0.
• Go to Strategy Web, and try to login with a user different than the Administrator.

1. The user will get the error:
   The Web Server encountered an unknown runtime error.
   (Second Authentication failed)

 
CAUSE:
This is a known issue in Strategy Web 9.5.0.
 
ACTION:
This issue has been fixed in Strategy Web 9.5.1. Take advantage of upgrading for a fix.
 
WORKAROUND:

• In the Strategy Web 9.5.0 Admin page, go to the Server's properties, like shown below.

• Select "Setup" to access the Strategy Usher configuration, like shown below.

• Enable the two-factor authentication by checking the box next to it, like shown below.
  

• Save the changes with the Administrator account.
• Disable the two-factor authentication by unchecking the box, like shown below.
  

• Save the changes again. The login should be successful now.