Any ideas what could cause various, not all, Views that have pages to go to 404 when logged in? Logged out they are fine. The perms are fine; set to view published content.

Accepted answer

Also, if you are working with Views that have contextual filters, check that the Raw URL filter type is set correctly; if it expects 3, and is only getting 1 paramater, for instance, then it will 404.

Comments

So that problem is fixed by logging out, and clearing the cookies. Appears to affect chromium-based browsers most ( Vivaldi + Chrome ).

Also, if you are working with Views that have contextual filters, check that the Raw URL filter type is set correctly; if it expects 3, and is only getting 1 paramater, for instance, then it will 404.