Publish to Tableau Server connector not working

[Kurohits]

Hi Experts,

I need to know the reason of Publish to tableau server tools not working while downloaded from Alteryx server? It was earlier working but today when i opened the workflow, it is showing QUESTION MARK in black box. I don't know what is the alternative to fix this error? If anyonwe knows, then please let me know how to fix this issue? 

[Raj · Accepted solution]

@Kurohits 
this means the tool is missing