Adding another rules doesnt work

[Lentilles]

What do i use at roundcube?

archive | 3.4
contextmenu | 3.2.1
filesystem_attachments | 1.0
jqueryui | 1.12.0
login_lang | dev-master  
managesieve | 9.3  
markasjunk | 2.0 
message_highlight | dev-master
newmail_notifier | 0.8
password | 5.1  
zipdownload | 3.4

What doesnt work?

Add new rules and colors on messages