I am building a web application consuming Spotify API.
The feature is simply searching for a song which had worked fine until yesterday.
However, all of a sudden I was not able to get a access token from the API server any more - which lead the search request not to work as well. The error message is as below.
Access to XMLHttpRequest at 'https://accounts.spotify.com/api/token' from origin 'https://(my site name)' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
I just cannot understand why this happens although any line of my codes has not been changed at all. Please give me some possible solutions and updates. Thanks.