Admin pannel scripts error on EE6.0.1 update installation

I recently updated my site from EE5.4 to EE6.0.1 following the documentation and everything working fine except some scripts on the admin side.

I have two errors and nothing like a drop-down or switcher not working properly in the admin panel.

The first and persistent one:

Uncaught ReferenceError: _ is not defined
    Underscore 5
admin.php:7365:5

The second and just sometimes appear:

Uncaught ReferenceError: React is not defined
    <a> mywebsite.com/admin.php?S=...&D=cp&C=javascript&M=combo_load&plugin=ui.touch.punch&file=cp/date_picker,cp/perpage,cp/publish/entry-list,components/bulk_edit_entries,cp/publish/bulk-edit,fields/relationship/mutable_relationship,fields/relationship/relationship&v=1611744164:665
admin.php:665:1

Any ideas how I can fix them without to proceed to reinstall the latest version of EE?

Thanks a lot for your time and help!