Call to undefined method Drupal\auto_node_translate\GoogleTranslationApi::t()

Doesn't look like you did but you are getting an error on the translation wich means you probably don't have the configuration correct.
I'm kind of on a schedule right now but i'll get to this as soon as possible.
By the whay does it work with MyMemory api?

Looks like the messages are related to deprecated funtions in Google\Protobuf soo your configuration might be ok.
If i fix the the error in the api
\Drupal::messenger()->addError($this->t('Error @code: @message'
->
\Drupal::messenger()->addError(t('Error @code: @message'
The node is translated.
I'll release a patch as son as i can

for now to avoid the deprecation erros you can update the google/protobuf
just run:
composer update google/protobuf --with-dependencies

Patch availabel can you test it?

Patch solved the issue.

Fixed in 2.1.7

Automatically closed - issue fixed for 2 weeks with no activity.