He's got problems even to log in using ssh so it doesn't seem to be a Winbox-related issue. @kayu, @XeviMB, it takes time for the ssh to generate a new key on the very first login attempt, and maybe a new one is generated after upgrade, so if you have tried to log in using ssh only once, try again ...

I have updated the wimbox to the latest version and it still fails

Thanks

Hello, The same thing happens to Kayu. Since I upgraded to v6.42.7 I can not access the routers, it indicates an incorrect username or password ... I think the problem is for the admin user ... in some routers I only had this user configured and now I can not enter Mikrotik any solution? Thanks in a...