Error when using BuddyBoss messages

I am using the BuddyBoss platform and theme.
When I try to send a message through the platform I get this error in the console:

select2.min.js?ver=1.6.7:1 Uncaught Error: No select2/compat/dropdownCss
    at j (select2.min.js?ver=1.6.7:1)
    at o (select2.min.js?ver=1.6.7:1)
    at select2.min.js?ver=1.6.7:1
    at D.apply (select2.min.js?ver=1.6.7:1)
    at new e (select2.min.js?ver=1.6.7:1)
    at new e (select2.min.js?ver=1.6.7:1)
    at HTMLSelectElement.<anonymous> (select2.min.js?ver=1.6.7:1)
    at Function.each (jquery.min.js?ver=3.5.1:2)
    at s.fn.init.each (jquery.min.js?ver=3.5.1:2)
    at s.fn.init.a.fn.select2 (select2.min.js?ver=1.6.7:1)

The file itself is located in:
/wp-content/plugins/cbxwpbookmark/assets/select2/js/select2.min.js?ver=1.6.7

When I disable the CBX WP Bookmark plugin the messaging works fine.

Can you please make this compatible with BuddyBoss.

Thanks