Access has been blocked by CORS policy

Issue description

The issue appears in browser-based (HTML5) builds of the application. When user sign up, log in or other request to Xsolla Login is performed, the following error message is displayed:

Access to XMLHttpRequest at '{request}' from origin '{your domain}' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the request resource.

Fix

Add the URLs that are allowed to call the API methods from the browser. To do it:

1. Open your project in Publisher Account.
2. In the side menu, click Login.
3. Click Configure in the pane of a Login project.
4. Select the Callback URLs section.
5. In the Allowed origins (CORS) field, add the URLs that will be allowed to call the API methods from the browser.
6. Click Save changes.