301 redirect error on new plugin version

Updated to latest version: 7.3.3.7 and when I try to use new Oauth, it sends (following the Infusionsoft permission page) me to a 301 with the following:

301 Moved Permanently
nginx

Fatal error: Uncaught Exception: Error authenticating new token with your WordPress Installation... in /home/formlift/public_html/wp-content/plugins/token-proxy-servcie/oauthv2.php:108 Stack trace: #0 /home/formlift/public_html/wp-content/plugins/token-proxy-servcie/oauthv2.php(71): infusionsoft_token_proxy_service::send_curl_params(Array) #1 /home/formlift/public_html/wp-includes/class-wp-hook.php(286): infusionsoft_token_proxy_service::finish('') #2 /home/formlift/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #3 /home/formlift/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #4 /home/formlift/public_html/wp-settings.php(450): do_action('init') #5 /home/formlift/public_html/wp-config.php(93): require_once('/home/formlift/...') #6 /home/formlift/public_html/wp-load.php(37): require_once('/home/formlift/...') #7 /home/formlift/public_html/wp-blog-header.php(13): require_once('/home/formlift/...') #8 /home/formlift/public_html/index.php(17): require('/home/formlift/... in /home/formlift/public_html/wp-content/plugins/token-proxy-servcie/oauthv2.php on line 108