Where to find Googlehome 'Unknown error'

HI,

I’ve connected my HA instance via Cloud/Nabucasa with my GoogleHome/GoogleAssistant. Works just fine (with a few oddities…)

Sometimes though I issue a voice command like ‘Hey Google, switch off Coffee’ or Hey Google, activate (script) Watch movies’, which is then executed just fine. But, GoogleAssitant says ‘an unknown error happened’.

Of course id like to know which error that was, or what caused it, but wouldn’t know where to look for that. Nothing pointing to the GoogleAssitant in the HA logs.

Would anyone have any pointers here?