UM3 apparently out of space?

[paoletto 3]

Ended up checking logs because cura (and web ui) can't cura-connect anymore.
How do i do some purge?
  
Edit: tried to activate developer mode to ssh in.
Apparently after reboot the printer thinks there's a failed print to remove, and dev mode not on :(
It must be in some broken state, and i'm afraid i have to factory reset it, losing all the settings :(

Edit: after resetting cura connect i managed to enable dev mode.
Printer still in loop at every reboot, thinking there's a failed print

Edit: after dev mode enable, trying to get in via ssh does this:
ssh root@192.168.250.148
Unable to negotiate with 192.168.250.148 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss
How to work around?

Edit: apparently workaround is ssh -oHostKeyAlgorithms=+ssh-dss

 

Edited June 15 by paoletto

[paoletto 3]

I found
209M    ./lib/connman/wifi_000e8e8a1fa9_554d486f7374_managed_psk

full of settings.xxxxx files. Can they be removed?

And how to reset the state "print present"?

Edit: I removed them, printer seems to still work. One more round of reset cura connect and now im finally in with cura.
Hopefully at the end of the print i'll be able to reset the build plate status

Edited June 15 by paoletto