Cannot read property 'async' of undefined

Hello,

I am getting the below error after upgrading our project to 7.7.1. Please advise.

Uncaught (in promise) TypeError: Cannot read property 'async' of undefined
    at mxui.js?636263688744647348:29
    at new Promise (<anonymous>)
    at mxui.js?636263688744647348:29
    at Array.map (<anonymous>)
    at u (mxui.js?636263688744647348:29)
    at r.update (mxui.js?636263688744647348:29)
    at mxui.js?636263688744647348:29
    at new Promise (<anonymous>)
    at r._update (mxui.js?636263688744647348:29)
    at mxui.js?636263688744647348:29

Thanks in advace