Upgrade 7.12.6 to 8.2 and does not load header menu

Hello,

I have upgraded from 7.12.6 to 8.2.0 but it does not load the header menu and CSS does not apply.

I follow the instruction SuiteCRM 7.12.x migration to SuiteCRM 8.x

@clemente.raposo Please can you help me?

Regards,
Asif Khalyani