I want to import an existing Theme in the DevExtreme ThemeBuilder via metadata. I got the error message "Metadata has a wrong format."
Access to XMLHttpRequest at 'https://js.devexpress.com/api/themebuilder/buildtheme' from origin 'https://devexpress.github.io' 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.
main.862f94c9c5680e8be834.js:1
ERROR Error: Uncaught (in promise): n: {"headers":{"normalizedNames":{},"lazyUpdate":null,"headers":{}},"status":0,"statusText":"Unknown Error","url":"https://js.devexpress.com/api/themebuilder/buildtheme","ok":false,"name":"HttpErrorResponse","message":"Http failure response for https://js.devexpress.com/api/themebuilder/buildtheme: 0 Unknown Error","error":{"isTrusted":true}}
at Lt (polyfills.a4090ea770c837a9e0e3.js:1:21843)
at Lt (polyfills.a4090ea770c837a9e0e3.js:1:21339)
at polyfills.a4090ea770c837a9e0e3.js:1:22722
at w.invokeTask (polyfills.a4090ea770c837a9e0e3.js:1:12360)
at Object.onInvokeTask (main.862f94c9c5680e8be834.js:1:2183353)
at w.invokeTask (polyfills.a4090ea770c837a9e0e3.js:1:12281)
at w.runTask (polyfills.a4090ea770c837a9e0e3.js:1:7380)
at $t (polyfills.a4090ea770c837a9e0e3.js:1:14780)
at w.invokeTask [as invoke] (polyfills.a4090ea770c837a9e0e3.js:1:13531)
at J (polyfills.a4090ea770c837a9e0e3.js:1:27317)
R6e @ main.862f94c9c5680e8be834.js:1
js.devexpress.com/api/themebuilder/buildtheme:1
Failed to load resource: net::ERR_FAILED
Access to XMLHttpRequest at 'https://js.devexpress.com/api/themebuilder/metadata' from origin 'https://devexpress.github.io' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
main.862f94c9c5680e8be834.js:1
ERROR Error: Uncaught (in promise): n: {"headers":{"normalizedNames":{},"lazyUpdate":null,"headers":{}},"status":0,"statusText":"Unknown Error","url":"https://js.devexpress.com/api/themebuilder/metadata","ok":false,"name":"HttpErrorResponse","message":"Http failure response for https://js.devexpress.com/api/themebuilder/metadata: 0 Unknown Error","error":{"isTrusted":true}}
at Lt (polyfills.a4090ea770c837a9e0e3.js:1:21843)
at Lt (polyfills.a4090ea770c837a9e0e3.js:1:21339)
at polyfills.a4090ea770c837a9e0e3.js:1:22722
at w.invokeTask (polyfills.a4090ea770c837a9e0e3.js:1:12360)
at Object.onInvokeTask (main.862f94c9c5680e8be834.js:1:2183353)
at w.invokeTask (polyfills.a4090ea770c837a9e0e3.js:1:12281)
at w.runTask (polyfills.a4090ea770c837a9e0e3.js:1:7380)
at $t (polyfills.a4090ea770c837a9e0e3.js:1:14780)
at w.invokeTask [as invoke] (polyfills.a4090ea770c837a9e0e3.js:1:13531)
at J (polyfills.a4090ea770c837a9e0e3.js:1:27317)
R6e @ main.862f94c9c5680e8be834.js:1
js.devexpress.com/api/themebuilder/metadata:1
Failed to load resource: net::ERR_FAILED
Failed to load resource: the server responded with a status of 404 ()