Others

How to Fix Power Automate New Designer e.enum.map Error

Maira Mehtab Sep 28, 2026 869 views

Question details

The user is unable to initialize operation details for a flow in the Power Automate New Designer due to an 'e.enum.map is not a function' error.

Product: Microsoft Power Automate
Device & OS: not provided
Scenario: Editing or running a previously functioning flow in the Power Automate New Designer.
Observed behavior: The system throws an error stating 'Unable to initialize operation details for operation - manual. Error details - e.enum.map is not a function' and fails to load the flow properly.

Before you start

Before troubleshooting, check if you can temporarily bypass the error by toggling off the New Designer mode to see if the workflow functions normally in the classic view.

Solution 1Recommended

Switch to Classic Designer and Report to Support

Since this error is typically a regression or bug within the Power Automate New Designer, the most effective workaround is reverting to the Classic Designer and reporting the specifics to Microsoft specialists.

The 'e.enum.map is not a function' error usually points to an internal mapping failure in the New Designer's code, especially affecting manual triggers that were created in older versions.

To keep your workflow operational, you should use the classic environment while the development team addresses the regression.

Toggle the Designer Mode

Look at the top right corner of the Power Automate interface and toggle off the 'New designer' switch to reload your flow in the classic designer.

Verify Flow Functionality

Once in the classic designer, verify that your triggers and actions initialize properly without displaying the e.enum.map error.

Document Your Environment

Note down your current browser, the operating system, and the specific trigger (e.g., manual trigger) that caused the initialization error.

Post in the Community

Navigate to the Microsoft Power Platform Community forums and create a new post detailing the error, your environment, and confirming that the flow still works in the classic designer so specialists can investigate.

Community Support: Providing detailed information about the affected triggers will help Microsoft engineers identify and patch the designer regression faster.

Free Microsoft Office alternative

Looking for a Lightweight and Reliable Office Suite?

While resolving Microsoft Power Automate designer bugs, you may also be looking for a more streamlined, cost-effective office solution. WPS Office is a powerful, free alternative to Microsoft Office that offers incredible compatibility, a familiar interface, and lightweight performance.

1. Download the Installer: Visit the official WPS Office website to download the free installer for your Windows, Mac, or Linux device.
2. Install WPS Office: Run the downloaded setup file and follow the quick on-screen instructions to install the suite.
3. Open Your Documents: Launch WPS Office and instantly open your existing Microsoft Office files without any formatting issues.

Fully compatible with Microsoft Word, Excel, and PowerPoint file formats.Lightweight design that ensures smooth performance without consuming excessive system resources.Familiar, intuitive user interface allowing for a seamless transition with zero learning curve.Built-in PDF editor and comprehensive tools to manage all your daily workflow needs.

microsoft office alternative - wps office

Frequently Asked Questions

What does the 'e.enum.map is not a function' error mean in Power Automate?

This error generally indicates a frontend bug or regression in the Power Automate New Designer where the system fails to properly map and initialize specific trigger or action details, often related to manual triggers.

How do I switch back to the classic designer in Power Automate?

You can return to the classic view by clicking the 'New designer' toggle switch located at the top right of the Power Automate flow editor screen, turning it to the 'off' position.

Where should I report bugs found in the New Designer?

You should report designer bugs in the Microsoft Power Platform Community forums. Be sure to include your browser details, the exact error message, and the specific actions that triggered the error.

Office Quick Solutions