UPDATED TO .net5 Tests ok so far, had to edit a package file just click on it and add a ) if necessary

server/AyaNova/ControllerHelpers/ApiUploadProcessor.cs

@@ -129,7 +129,7 @@ namespace AyaNova.Api.ControllerHelpers
             var hasMediaTypeHeader = MediaTypeHeaderValue.TryParse(section.ContentType, out mediaType);
             // UTF-7 is insecure and should not be honored. UTF-8 will succeed in 
             // most cases.
-            if (!hasMediaTypeHeader || Encoding.UTF7.Equals(mediaType.Encoding))
+            if (!hasMediaTypeHeader || Encoding.UTF8.Equals(mediaType.Encoding))
             {
                 return Encoding.UTF8;
             }