Errors in log file

Bunches of errors in the log file……. WP 3.9.1 and latest WooCommerce:

Stack trace:
#0 [internal function]: coinbase_callback('')
#1 /home/MYSITE/public_html/wp-includes/plugin.php(470): call_user_func_array('coinbase_callba...', Array)
#2 /home/MYSITE/public_html/wp-settings.php(352): do_action('init')
#3 /home/MYSITE/public_html/wp-config.php(93): require_once('/home/pooalexa/...')
#4 /home/MYSITE/public_html/wp-load.php(29): require_once('/home/pooalexa/...')
#5 /home/MYSITE/public_html/wp-blog-header.php(12): require_once('/home/pooalexa/...')
#6 /home/MYSITE/public_html/index.php(17): require('/home/MYSITE/...')
#7 {main}
  thrown in /home/MYSITE/public_html/wp-content/plugins/coinbase-woocommerce-master/callback.php on line 43

https://www.ads-software.com/plugins/coinbase/