How to disable CORS

My Web-pouchdb-app has lost connection to my couchbase server. All is on site.
My couchbase server showed me an error of “ip has changed” when i logged into it.
Not sure if it is related.

my web-app is showing this error.

“Access to fetch at ‘http:// cb-ip :4984/webdata/’ from origin ‘’ 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. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.”

Anyone have any ideas to fix, Thanks