Vue has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

The error message you are seeing indicates a Cross-Origin Resource Sharing (CORS) issue. CORS is a browser security feature that prohibits web pages from making requests to a different domain than the one that served the page.

To resolve this issue, you have a few options:

1. Configure the server: You need to add the appropriate response headers to your server's responses to allow cross-origin requests. Specifically, you need to include the "Access-Control-Allow-Origin" header with the value of the requesting domain.

2. Use a proxy server: If you don't have control over the server's configuration, you can set up a proxy server that forwards requests from your domain to the target server. By doing this, the same-origin policy will be satisfied, and CORS won't be an issue.

3. Use a JSONP request: If the server supports JSONP (JSON with Padding), you can use it as an alternative. JSONP is a technique that allows making cross-origin requests by dynamically adding a ```<script>``` tag to the page.

Choose the appropriate solution based on your specific situation and server setup.