The other day I discovered that I got "CAN Error" when I tried to connect to my Leaf via my ELM327. First I thought that maybe something is wrong with the ELM327, but I attached to another car (not an LEAF), and it worked, so the ELM327 is innocent.
Then I cleared the cache for LeafSpy Pro, uninstalled the app, reboot my phone and then reinstalled app. But with the same error message.
Then I installed the app on another Android phone, but I got the same error message again.
So I´m out of idea what to test next. Unfortunately I don't have access to any other Nissan Leaf, so I cannot troubleshoot from that angle.