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Error with CORS Policy

I am having an issue connecting. I'm locally trying to start the layout of my app and I keep getting this error. I've looked online and the only fix is to change the settings in the server which I can't do. So I'm just wondering if anyone else has had this issue. Thank you and I hope this isn't a repeat but I tried to search beforehand and didn't find anything.

Access to XMLHttpRequest at 'http://tylertexas-rets.paragonrels.com/rets/fnisrets.aspx/TYLERTEXAS/login?rets-version=rets/2.0' from origin 'http://localhost:3000' 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. index.js:1 Error: Network Error at createError (vendors~main.chunk.js:1125) at XMLHttpRequest.handleError (vendors~main.chunk.js:502) console.<computed> @ index.js:1 home.js:12 undefined tylertexas-rets.paragonrels.com/rets/fnisrets.aspx/TYLERTEXAS/login?rets-version=rets/2.0:1 Failed to load resource: net::ERR_FAILED