Access to XMLHttpRequest at 'http://sp-web:8080/_api/search/searchcenterurl?suxrid=ms-oil-datasource-searchcenterurl' from origin 'http://localhost:8080' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '1; RequireReadOnly', but only one is allowed.
Access-Control-Allow-Origin
Error : "The 'Access-Control-Allow-Origin' header contains multiple values" while enabling CORS in SharePoint 2013 - SharePoint Stack Exchange[^]: For this we have to disable the "Request Management" service on the SharePoint server.
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