While doing the Ancestry web-search on Family Tree Maker software 2019 you may get a Security error or a blank page. This is a known issue and Mackiev is working with Ancestry to resolve it at the earliest.
FTM directly connects to Ancestry so you can search for records without visiting Ancestry’s website. You must have an Ancestry subscription to access the search results from Ancestry. Log into the Ancestry account on your Family Tree Maker first to use the web search feature.