hi all, I am running KDE neon 5.27.6, im confused why I am receving a genaric Failure: Module initialization failed when running

$ pactl load-module module-null-sink media.class=Audio/Source/Virtual sink_name=obs-mic channel_map=front-left,front-right

running

$ pactl load-module module-null-sink sink_name=obs-mic channel_map=front-left,front-right

works just fine.

my pacl info

Server String: /run/user/1000/pulse/native
Library Protocol Version: 35
Server Protocol Version: 35
Is Local: yes
Client Index: 52
Tile Size: 65472
User Name: hello-hotel
Host Name: hello-hotel-tuff
Server Name: pulseaudio
Server Version: 15.99.1
Default Sample Specification: s16le 2ch 44100Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.pci-0000_0d_00.4.analog-stereo
Default Source: obs-mic.monitor
Cookie: ***sensored***

thanks for your help!