Hello

I have an Onion Omega and Arduino dock original from kickstarter times.

It has been working as an old project and wanted to update the Arduino code via wireless. it was working fine before, a few months ago, but now I get

processing.app.debug.RunnerException
at cc.arduino.packages.uploaders.SSHUploader.uploadUsingPreferences(SSHUploader.java:150)
at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)
at processing.app.SketchController.upload(SketchController.java:732)
at processing.app.SketchController.exportApplet(SketchController.java:703)
at processing.app.Editor$UploadHandler.run(Editor.java:2055)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcraft.jsch.Session.receive_kexinit(Session.java:582)
at com.jcraft.jsch.Session.connect(Session.java:320)
at cc.arduino.packages.uploaders.SSHUploader.uploadUsingPreferences(SSHUploader.java:122)
... 5 more

I am using

• Ubuntu 20.04, with all its latest updated- arduino ide 1.8.13- onion omega board link
  https://github.com/OnionIoT/Onion-Arduino-Boards/raw/master/IDE_Board_Manager/package_onion.io_index.json
  my .ssh/config has
  Host Omega-0B95
      StrictHostKeyChecking no
      User root
      Ciphers 3des-cbc,aes128-ctr,aes256-ctr
      KexAlgorithms +diffie-hellman-group1-sha1

worst case I can upload the code manually via ssh and updated it via "sh  /usr/bin/arduino-dock i2c_liquid_sensor.ino.with_bootloader.hex", but just curious as to why it started failing

Any ideas/suggestions  would be appreciated?
cheers,
Pasquale