TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: недопустимое значение «undefined» для заголовка «Access-Control-Allow-Origin» в ServerResponse.setHeader (_http_outgoing. js: 529: 3) в / home / anshul / Gullak-master / app /routes.js:9:10 в Layer.handle [как handle_request] (/home/anshul/Gullak-master/node_modules/express/lib/router/layer.js:95:5) в trim_prefix (/ home / anshul / Gullak-master / node_modules / express / lib / router / index. js: 317: 13) по адресу /home/anshul/Gullak-master/node_modules/express/lib/router/index.js: 284: 7 в Function.process_params (/home/anshul/Gullak-master/node_modules/express/lib/router/index.js:335:12) в следующий (/ home / anshul / Gullak-master / node_modules / express) /lib/router/index.js:275:10) в SendStream.error (/home/anshul/Gullak-master/node_modules/serve-static/index.js:121:7) в SendStream.emit ( события. js: 311: 20) в SendStream.error (/home/anshul/Gullak-master/node_modules/send/index.js:270:17) в SendStream.onStatError (/ home / anshul / Gullak- ведущий / node_mo dules / send / index. js: 421: 12) на следующем (/home/anshul/Gullak-master/node_modules/send/index.js:763:28) в / home / anshul / Gullak-master / node_modules / send / index. js: 771: 23 в FSReqCallback.oncomplete (фс. js: 166: 21