Fixed JSON bug

mod/updates/handler.go

@@ -113,7 +113,7 @@ func HandleUpdateDownloadRequest(w http.ResponseWriter, r *http.Request) {
 		})
 		if err != nil {
 			//Finish with error
-			c.WriteMessage(1, []byte("{\"error\":\""+err.Error()+"\""))
+			c.WriteMessage(1, []byte("{\"error\":\""+err.Error()+"\"}"))
 		} else {
 			//Done without error
 			c.WriteMessage(1, []byte("OK"))

mod/updates/updates.go

@@ -96,7 +96,7 @@ func DownloadUpdatesFromURL(binaryURL string, webpackURL string, checksumURL str
 			errorMessage = err.Error()
 			return err
 		}
-		checksumFileContent, err := os.ReadFile(checksumDownloadTarget)
+		checksumFileContent, err := ioutil.ReadFile(checksumDownloadTarget)
 		if err != nil {
 			errorMessage = err.Error()
 			return err