SugarCRM 14.2 introduces a brand-new user interface, and the new Sugar Market Connector 2.2.1 bundle has been optimized to work seamlessly with it, including an update to the Buyer’s Journey iframe's interface. You can find the bundle download and installation instructions in our SugarCRM Connector for Sugar Market guide.
If you do not install the 2.2.1 Sugar Market Connector bundle after upgrading to SugarCRM 14.2 you will experience issues with the iframe in your SugarCRM instance. If you have any questions, please leave a comment below!