Beta version 2.0 was released and it has this bug fixed.
Curious? Visit our G+ Beta community
I get the error about ten times a day, and then a Google security error as it tries so many times in a row. I have to lower the security for Gmail, or all devices. including desktop, are locked out.
Google says that us caused by an old program or one that uses questionable security practices. But, that is probably just Google, as they say Outlook and Thunderbird have the same error.
Even easier. change the sync to Never. Works perfectly. Then turn it back on when you feel like it.
Makes search only about 50% useful not having it.