After logging into Pinball nirvana the web site shows an error on the page that loads after the successful login:
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vBulletin Message
Invalid Redirect URL (http://pinballnirvana.com/)
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In addition the "remember me" checkbox does not work
You can interact with the ChatGPT Bot in any Chat Room and there is a dedicated room. The command is /ai followed by a space and then your ? or inquiry.
ie: /ai What is a EM Pinball Machine?