Disclaimer: "The inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization"
Marked as answer
MRMallesh Ravi Chandran Syncfusion Team May 11, 2023 10:45 AM UTC
We have included the fix for the issue “The file upload method await UploadObj.UploadAsync(); throws a null exception" with our release version 21.1.39. So please upgrade your package to the latest to resolve the issue from your end.