Hello there,
i installed grav in an subdirectory like this:
xyz.de/sub/
(I used the ReWrite rule in the .haccess as usal and everthing works fine).
Since i ve updated to V1.6.6 this twig command delivers only the '/sub/' directory:
url('theme://assets/img/logo-wide.svg') -> delvivers '/sub/'
I found out that '-' or '_' in the file name causes the failure.
So i use this workaround now:
url('theme://assets/img/logo.svg')