Frustrated by getting QuickBooks Error 3260 and needed instant help to fix it.

I have been operating the QBPOs for a long time, and it was working without giving me any errors. But, suddenly, it started popping up with QuickBooks Error 3260, and I don’t know what to do next. Someone suggested to me that the Intuit tech experts would guide me with the error. But, the worst part is that I have been trying to contact them for the last three days, but none of them are answering my calls. So I am really very disappointed with the Intuit team and don’t have any idea how to proceed further. So, please share some insight on my query and teach me how to resolve this error.
Related issue- https://dataservicesolutions.com/blog/getting-quickbooks-error-3260-unable-to-complete-transactions/ Tweet