Getting that error message when trying to post in Community. Please help, tried doing all the troubleshooting but still the same. QuickBooks Online

Thank you for reaching out with your issue, @kimmy7.

I noticed that you've posted this question twice. To avoid any confusion and to help you better, please check my colleague's response to your original post by clicking this link: https://quickbooks.intuit.com/learn-support/en-us/other-questions/re-getting-an-error-message-authentication-ticket-mismatched/01/1558053/highlight/true#M180468

If you have any further questions, you can always come here. The Community Team can assist you at any time.