AppSync: Unable to access the AppSync UI with a message saying "Log in Successful"

After logging into AppSync, the following message is shown instead of the AppSync UI.

Log In Successful
 
You have successfully logged into the Central Authentication Service.
 
For security reasons, please Log Out and Exit your web browser when you are done accessing services that require authentication

This error is seen when users select the wrong URL from their browser URL window when logging in.

Web browsers such as Firefox, Chrome, or Internet Explorer often prompt with suggestions for previously visited sites.
If HTTPS://link, is selected, the login process begins from an incorrect point and may not complete appropriately.

https://Appsyncserver:8444/cas-server/login?TARGET=https%3A%2F%2target address%3A8445%2Fappsync%2F

To resolve this issue, use the correct AppSync URL (see below). Once this URL is employed, log in begins from the correct point and allows full access to the UI.
Note: This URL is an HTTP link that initiates the HTTPS session with the AppSync Server.

http://appsync_server:8085/appsync

For additional information, see the AppSync Installation and Administration Guide. Within this document, go to AppSync Console > Start the AppSync Console.

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