Uncaught (in promise) ReferenceError: moment is not defined, Uncaught (in promise) TypeError: Cannot read properties of null (reading 'style')

[fire1ce]

Console errors:

SpotifyDomBuilder.js:770 Uncaught (in promise) ReferenceError: moment is not defined
    at SpotifyDomBuilder.getSanitizedTime (SpotifyDomBuilder.js:770:16)
    at SpotifyDomBuilder.getPlayerData (SpotifyDomBuilder.js:341:27)
    at SpotifyDomBuilder.nowPlaying (SpotifyDomBuilder.js:171:30)
    at Class.getDom (MMM-OnSpotify.js:218:27)
    at main.js:110:35
    at new Promise (<anonymous>)
    at updateDom (main.js:108:10)
    at Object.updateDom (main.js:531:4)
    at Class.updateDom (module.js:333:6)
    at Class.smartUpdate (MMM-OnSpotify.js:546:21)
getSanitizedTime @ SpotifyDomBuilder.js:770
getPlayerData @ SpotifyDomBuilder.js:341
nowPlaying @ SpotifyDomBuilder.js:171
getDom @ MMM-OnSpotify.js:218
(anonymous) @ main.js:110
updateDom @ main.js:108
updateDom @ main.js:531
updateDom @ module.js:333
smartUpdate @ MMM-OnSpotify.js:546
socketNotificationReceived @ MMM-OnSpotify.js:300
(anonymous) @ module.js:232
(anonymous) @ socketclient.js:38
Emitter.emit @ index.mjs:136
emitEvent @ socket.js:498
onevent @ socket.js:485
MMSocket.socket.onevent @ socketclient.js:32
onpacket @ socket.js:455
Emitter.emit @ index.mjs:136
(anonymous) @ manager.js:204
Promise.then (async)
(anonymous) @ websocket-constructor.browser.js:5
ondecoded @ manager.js:203
Emitter.emit @ index.mjs:136
add @ index.js:146
ondata @ manager.js:190
Emitter.emit @ index.mjs:136
onPacket @ socket.js:339
Emitter.emit @ index.mjs:136
onPacket @ transport.js:98
onData @ transport.js:90
ws.onmessage @ websocket.js:68
30SpotifyDomBuilder.js:398 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'style')
    at SpotifyDomBuilder.updatePlayerData (SpotifyDomBuilder.js:398:14)
    at Class.smartUpdate (MMM-OnSpotify.js:557:29)
    at Class.socketNotificationReceived (MMM-OnSpotify.js:300:14)
    at module.js:232:9
    at Socket.<anonymous> (socketclient.js:38:4)
    at Emitter.emit (index.mjs:136:20)
    at Socket.emitEvent (socket.js:498:20)
    at Socket.onevent (socket.js:485:18)
    at MMSocket.socket.onevent (socketclient.js:32:11)
    at Socket.onpacket (socket.js:455:22)

[fire1ce]

This issue exists when no other module including default is loaded to the dom.
I think you are using existing loaded modules from other modules.
you can reproduce it by loading as single module of MMM-OnSpotify in the config.js of the MagicMirror.

[Fabrizz]

That is strange, as its not loading the moment library (vibrant also is loaded but it cannot find it, as the colors on the left do not match). I was going to suggest doing a clean dependencies install, but its loading them to the browser correctly. Can you try not using HTTPS? (Just to know), also doing a CTRL + F5 should clean your browser cache

[fire1ce]

Like i mentioned before. The issue only happens ONLY when no other module is loaded before this one. I've tested with new MagicMirror Image + new npm modules. as clean as it can be. there is a big chance the issue is in the core of the MagicMirror since i've encountered something similar.
I've already open an issue about it: https://github.com/MichMich/MagicMirror/issues/3143
Might be connected.