This is your session's ID.
You need to contact your Tableau Server Admin of your company / check logs
Thank you for your reply. I'm the server administrator. I'm getting some complaints from the user about this issue.
Is there any way to resolve this issue.
Refer --->How do I debug "Unknown Server Error"
Can you search for the session ID Vt2JFQoSRQoAAA3kklsAAAJQ in server logs and upload a screenshot of what you found? You can attach screenshot by clicking "advanced editor" on top right corner of your post.
Another alternative is to submit a free tech support case to Tableau. Technical Support Services FAQs | Tableau Software