I have received complaints from several members that they are unable to log in and post items that they had no problem posting just a month ago. They go through the usual process, but when they are finished, they still aren't logged in. They are receiving no error messages, until they try to do something that requires being logged in and then they are informed that they aren't logged in. It's somewhat difficult getting further information about what browsers they are using, etc. I have done my own experiments and found that I can recreate this problem on Firefox in privacy mode in both my newer Bootstrap enabled sites and some older sites not including bootstrap. Logged in, I can get into Wikidot, but the individual wikis do not recognize me as being logged in.