error: unable to complete your transaction with square due to some issue. for no

Square transaction fails, log shows the following:
12-11-2020 @ 21:18:31 – Info: Begin processing payment for order 1817 for the amount of 0.01
12-11-2020 @ 21:18:31 – Error: Array
(
[0] => stdClass Object
(
[code] => VALUE_EMPTY
[detail] => Field must not be blank
[field] => source_id
[category] => INVALID_REQUEST_ERROR
)

)

I have disabled all plugins other than Woocommerce and APIEXPERTS – SQUARE FOR WOOCOMMERCE. I have tried hiding the 2nd address line as one thread suggested. Error began yesterday 2020/12/10. Everything was working fine before and there hasn't been any site updates recently.

The only automatic plugin update that I can see was:
Google Analytics for WordPress by MonsterInsights (from version 7.13.2 to 7.13.3)
Even when deactivated it didn't make a difference.