老师你好,我已经把.env.development中的localhost全部改为:localhost:8081后项目已可以运行,点击电子书可以进入详情页,可以获取到电子书资源,此时可以进行正常阅读,但是一点进详情页还会有报错,报错信息是: GET http://localhost:8081/epub2/2017_Book_InformationInfrastructuresWith/OEBPS/META-INF/com.apple.ibooks.display-options.xml 404 (Not Found)
Access to XMLHttpRequest at 'http://localhost:8081/epub2/2017_Book_InformationInfrastructuresWith/OEBPS/META-INF/com.apple.ibooks.display-options.xml' from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.请问这又是怎么回事,这么解决?