Cannot connect UPS Account

Hi, I’m trying to setup the plugin but I haven’t being able to do it. When I go to the settings and click the Authorize button I am redirected to UPS login, I put my username and password and login, then I get redirected to UPS Create Shipment page and not getting back to my website to finish the Authorization.

Here’s the Authorization URL (I removed my domain for privacy): https://ups-oauth.octolize.com/action.php?action=start&return_url=https%3A%2F%2F*****.com%2Fwp-admin%2Fadmin.php%3Fpage%3Dwc-settings%26tab%3Dshipping%26section%3Dflexible_shipping_ups%26app%3Dlive_rates&security=b34faa68d0&ajax_url=https%3A%2F%2F*****.com%2Fwp-admin%2Fadmin-ajax.php&app=live_rates&test_api=

Thanks in advance for the help!