I can not find the page that to download vision assistant it says this page should be deleted or something
You can download Vision Development module here: https://www.ni.com/en-us/support/downloads/software-products/download.vision-development-module.html...
It includes Vision assistant.
thanks but now it says an error occured while installing a package: ni-package-manager-deployement-support(126.96.36.199152-0+f0)
Check out this KB article: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019YYdSAM&l=en-US