Ancestry are overloaded at present, with lots of errors reported.
Their recommended search method doesn't help. They suggest starting with "Every Record We Have", than applying filter after filter to narrow down the results. All these transactions take time for us, and a large amount of resource on the servers.
The "old-fashioned" search method, where you decide what dataset is likely to contain what you are looking for, and you just search that, IS still available. The "Card Catalogue" on the Search menu is the place to start.
Many years ago I used "Customise your homepage" on the front page to add links to the relevant Census datasets. That way I can go straight to the relevant search page.
Note that the search forms for individual datasets are more closely allied to the contents than is the "Every Record" form. You are likely to be able to fill in better search terms and get results quicker.