We can no longer access the EXOS switch by SSH with any local admin account

[Erika]

Im starting an SSH session, i put the ip address of my switch and then ask me for my login name and password but it does not recognize them not even the local admin account

[Kenneth_Potter]

Erika,
Are you local to the switch do you get the same results if you use the console port?

you can try this;
does requires a couple of reboots
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-Recover-A-Switch-And-Its-Configurat...