Replaced err.message with err

Author: mgsium

extensions/ql-vscode/src/extension.ts

@@ -511,7 +511,7 @@ async function activateWithInstalledDistribution(
           const errorMessage =  err.message.includes('Generating qhelp in markdown') ? (
             `Could not generate markdown from ${pathToQhelp}: Bad formatting in .qhelp file.`
           ) : `Could not open a preview of the generated file (${absolutePathToMd}).`;
-          void helpers.showAndLogErrorMessage(errorMessage, { fullMessage: `${errorMessage}\n${err.message}` });
+          void helpers.showAndLogErrorMessage(errorMessage, { fullMessage: `${errorMessage}\n${err}` });
         }
         // Manual cleanup
         void o.cleanup();