diff --git a/packages/nx/src/utils/params.ts b/packages/nx/src/utils/params.ts
index 0dfdbbd47ee05..931dc7c554433 100644
--- a/packages/nx/src/utils/params.ts
+++ b/packages/nx/src/utils/params.ts
@@ -72,6 +72,8 @@ export async function handleErrors(isVerbose: boolean, fn: Function) {
   try {
     return await fn();
   } catch (err) {
+    err ??= new Error('Unknown error caught');
+
     if (err.constructor.name === 'UnsuccessfulWorkflowExecution') {
       logger.error('The generator workflow failed. See above.');
     } else if (err.message) {