CORS报错
跟着老师敲的,但总是报下面的错误 Access to XMLHttpRequest at 'localhost:8090/user/getotp' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https. 其他答案里面的方法都用过了,还是不行,有没人能帮忙解决一下呀