Request get blocked when over 10240 content-length

fter trying a lot of combinations this is the error i get, when Json request is less than 10240 it goes through without problem. I am using angular deployed on an azure server. My backend is written in nodeJS. I did not had this issues yesterday, just today.

Access to XMLHttpRequest at URL from origin URL has been blocked by
CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the
requested resource. polyfills-es2015.289…68f30b383baa32.js:1 POST URL
net::ERR_FAILED main-es2015.c96fe56….js:1 ERROR C {headers: h, status:
0, statusText: "Unknown Error", url: URL , ok: false, …} error:
ProgressEvent {isTrusted: true, lengthComputable: false, loaded: 0,
total: 0, type: "error", …} headers: h {normalizedNames: Map(0),
lazyUpdate: null, headers: Map(0)} message: "Http failure response for
URL : 0 Unknown Error" name: "HttpErrorResponse" ok: false status: 0
statusText: "Unknown Error" url: "URL "