I seem to be the only one having this problem, so maybe there's some obscure setting, etc. that I'm missing.
I can run tasks through a Google Assistant voice command ("Run <task name> with Tasker") and this always works, but only if Android Auto is not running. When AA is running, I always get the response, "Sorry, I don't understand."
I've tried various forms of the command ("Do <task name> in Tasker", etc.), different names for the tasks, moving the tasks to the home project in Tasker, setting them up as App Shortcut Tasks. Oddly enough, when trying the App Shortcut Task method, the response from GA changes to tell me that to do that I have to have an Android phone running that app, which implies that, with AA running, Google doesn't think Tasker is installed.
Any ideas?