When visiting some sites on Cromite, Fennec, or IronFox on my Android devices, the Anubis challenge fails with the error “invalid response”. I don’t recall if there were any other error messages that came up. This only affects a seemingly random portion of sites using Anubis and does not clear up after refreshing, both immediately and after waiting several hours. It’s never affected Firefox and Librewolf on desktop, however.
Anyone know why it happens, how to avoid it, or what logs I could collect for an issue report on Github?
Is your user agent set to a generic Mozilla? Some have harder challenges for certain user agents too.
Looks like the usual Mozilla/5.0 user agent string. On the note of harder challenges, I have run into instances that set the difficulty to 10, which effectively makes the site inaccessible on mobile and desktop.