How to fix error in CORS?

Question

CORS

Access to fetch at ' localhost:81/auth/login ' from origin ' hpzgizh3nfa51rlnkezh.com ' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header contains multiple values ​​' hpzgizh3nfa51rlnkezh.com , hpzgizh3nfa51rlnkezh.com ', but only one is allowed. Have the server send the header with a valid value, or, if an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.