After I reset RB260GS and enter its default IP address http://192.168.88.1, the web interface could not enter its settings interface but shows the “ERROR: Wrong password” directly. The login button doesn’t work either. Please see the attachment. I tried two RB260GS and they have the same phenomenon. Besides, it’s possible to ping the RB260GS while connecting RB260GS via winbox doesn’t work. Any solutions for this phenomenon? Thx in advance.

Could it be a cache problem? Have you tried using an InPrivate session?
Hi,
same problem here, I installed new fw on my RB260IGS at the begining of September and after putting user name and password in it says: “Authentication failed: invalid username or password.” When I used my second credentials it worked, but only once and using them again it gives the same error “Authentication failed: invalid username or password.” I made few other accounts so I can get in, but I cannot use one account more then once. When I change the password for an old account it does not work either. Same for web interface and Winbox. Only non standard config I use is ftp server on 256 sdxc that used to work and works fine.
Have a nice day