How to Add Submenu

[Yugank-mialo]

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• [yes ] I am running the latest version
• [ yes] I checked the documentation and found no answer
• [yes ] I checked to make sure that this issue has not already been filed
• [ yes] I'm reporting the issue to the correct repository (for multi-repository projects)

Expected Behavior

Current Behavior

I want to Add SubMenu but i'm not able to update Menu.js it's always giving Error no matter what is tried

Failure Information (for bugs)

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Steps to Reproduce

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1. step 1
2. step 2
3. you get it...

Context

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Failure Logs

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