Audacious

I had problem with not working scrobbler for a long time and after searching for root cause I found out that after I run audacious with
modified env:

$ LC_ALL=C audacious

scrobbler starts working. I have mixed locale settings:

$ locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE=en_US.UTF-8
LC_NUMERIC=pl_PL.UTF-8
LC_TIME=pl_PL.UTF-8
LC_COLLATE="en_US.UTF-8" 
LC_MONETARY=pl_PL.UTF-8
LC_MESSAGES="en_US.UTF-8" 
LC_PAPER=pl_PL.UTF-8
LC_NAME="en_US.UTF-8" 
LC_ADDRESS="en_US.UTF-8" 
LC_TELEPHONE="en_US.UTF-8" 
LC_MEASUREMENT=pl_PL.UTF-8
LC_IDENTIFICATION="en_US.UTF-8" 
LC_ALL=

P.S. Check Permission in plugin settings still gives Network Problem even in modified env