After upgrading to 6.0.5, I could use the admin console, but no eisyui.

I was able to recover by installing the eisyui package, enabling, and rebooting.

Your mileage may vary..... etc, etc.

I experienced the same thing., was running 5.9.1.

My process was:

take backup

launched UD mobile and kicked off firmware upgrade

while watching it upgrade, cleared all JAVA files and cache

after about 10 minutes I would say, UD Mobile said firmware update complete

BUT then immediately told me another update was available. Decided to wait on applying another update in case it was confused.

Went to ISY Web Portal and selected "ISY Web Access"

This launched a web version of my EISY.

Then went to Settings, "Install Admin Console (internet).

This got the EISY Admin Console installed on my PC and was able to login like before. Using local credentials.

Then tried to access eisy.local and nothing. Decided to wait the full 60 minutes like the upgrade instructions said.

After the full 60 minutes, still no access.

Went back to UD Mobile and let it do the other update it mentioned. This updated PG3X to version 3.4.18.

This time it said a reboot was required, so let it reboot.

Tried to access eisy.local and still no access.

Decided to try and do the eisyui install from CLI.

SSH'd into the appliance

Ran "sudo pkg install eisyui"

It did say this package wasn't installed and did I want to install it, said Yes.

Monitored it installing and doing numerous migrations.

Then restarted ISY "sudo service isy restart"

Tried to access eisy.local and still no access.

And I could no longer get in with the UD Mobile or the Admin Console.

Rebooted the EISY appliance

This time the UD Mobile worked and I could access the Admin Console

Now the Admin Console required me to use my ISY Portal Credentials, not the local credentials I was using in the past.

AND.... FINALLY, I could get access to eisy.local

I believe I have seen numerous posts that say the upgrade package installs eisyui, for me it didn't.

Anyway, hopes this helps someone else in the future.