I have a client who sells highly technical products and has lots and lots (a couple of hundred) pdf datasheets that can be downloaded from their website. But in order to download a datasheet, a user has to register on the site. Once they are registered, they can download whatever they want (I know this isn't a good idea but this wasn't set up by us and is historical). On doing a Moz crawl of the site, it came up with a couple of hundred 401 errors. When I investigated, they are all pages where there is a button to click through to get one of these downloads. The Moz error report calls the error "Bot verification".
My questions are:
Are these really errors?
If so, what can I do to fix them?
If not, can I just tell Moz to ignore them or will this cause bigger problems?
British manufacturer of hospital furniture dropped from 35 to 21 overnight. The only saving grace is that their competitors have dropped in the same ratio.