If your website uses https, make sure that “Use Secure URLs on Storefront” option is set to “Yes” at Stores -> Configuration -> General -> Web -> Base URLs (secure) in your Magento 2 admin panel.
Screenshot: HTTPS settings
In order to activate the extension, go to Stores -> Configuration -> GoMage -> Activation 2.0 section in your admin panel of Magento 2. The list of all installed GoMage extensions is displayed on this page.
Step 1. Click “Activate Extensions” button. You are redirected to the authentication page on https://www.gomage.com website where you need to enter the login and password for your GoMage account in order to verify your identity.
Click “Authorize” button in order to allow the application access to your account, verification of your data and activation of your GoMage extensions.
Step 2. After successful authentication you are redirected back to the extension activation page in your admin panel of Magento 2, and all GoMage extensions installed on your site become activated, unless some of your licenses are blocked or there are any other factors hindering the activation process. The activation status of extensions changes depending on whether or not each extension has been activated, and the information about the quantity of domains available for activation on every license is displayed.
Step 3. Expand the list of websites/stores existing in your Magento and choose those of them for which the extension needs to be activated. Remember that your license must be valid for the necessary number of additional domains if you wish to activate the extension for more than one site within the same Magento. If you try to activate the extension for more sites than your license allows, you will get a corresponding error message on the Activation page.
The “Available domains” field shows the number of domains allowed for every extension license. If the license is valid for 10 domains and only 2 websites have been selected for extension activation, the number of remaining available domains is 8, which means that you can activate the extension for 8 more websites within the same installation of Magento 2.
The “Show available domains” button at the top of this section can be used to refresh the information about all extension licenses and the number of websites allowed for activation on every license.