When I enter in my website (with Cobalt) with no user account I receive a "Fatal Error"

[Prozoon700]

Describe the issue

The other day I install Cobalt v1.6.7 and I while I was setting all I saw that when you enter in the website with no account it shows you this page (is in spanish) with the title of Fatal Error.

I have tested a lot of things but I don't know whats the problem, can someone help? I know Cobalt v1.6.7 is not for NamelessMC v2.1.0, but if I reinstall an old version I could have some problems?

Thanks for the help and I'll be waiting response.

NamelessMC Version

2.1.0

To Reproduce

1. Go to your website.
2. Wait until the Goverment takes out the electricity of your house.

Expected Behaviour

No response

Screenshots

No response

Additional Information

Chrome Console Log:

jquery.min.js:2 jQuery.Deferred exception: Cannot read properties of null (reading 'classList') TypeError: Cannot read properties of null (reading 'classList')
    at HTMLDocument.<anonymous> (https://foro.faircraft.online/:131:39)
    at e (https://foro.faircraft.online/core/assets/vendor/jquery/dist/jquery.min.js:2:30310)
    at t (https://foro.faircraft.online/core/assets/vendor/jquery/dist/jquery.min.js:2:30612) undefined
E.Deferred.exceptionHook @ jquery.min.js:2
jquery.min.js:2 Uncaught TypeError: Cannot read properties of null (reading 'classList')
    at HTMLDocument.<anonymous> ((índice):131:39)
    at e (jquery.min.js:2:30310)
    at t (jquery.min.js:2:30612)

[PadowYT2]

This isn't an issue with NamelessMC, please refer to the Coldfire Design server and I'll help you there

[Prozoon700]

Ok, sorry