I give this addon a try inside Vaadin 13.0.3 but got an error in the browse

I give this addon a try inside Vaadin 13.0.3 but got an error in the browser:

Uncaught TypeError: Cannot read property ‘classList’ of undefined
at goToPage (vertical-menu-styles.js:16)
at Object.eval (eval at jt (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:975), :3:1)
at jt (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:975)
at it (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:931)
at gt (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:557)
at Pq (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:478)
at lr.mr [as W]
(client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:983)
at eA (client-3B1D64116B46DEBA7ADE32AB75416693.cache.js:866)

Any hint?

Hi Andreas!
We we’re not able to reproduce this issue, if you have a sample project that is able to, please be welcomed to [fill in an issue on our GitHub page]
(https://github.com/FlowingCode/VerticalMenuAddon/issues).
Please note that today we released a new version that is compatible with Vaadin 14 NPM mode.