Simple cat command not working

[TobinPalmerAlt]

This code doesn't output anything:

#!/bin/bash
SOURCE=$(cat ~/Library/DoNotDisturb/DB/Assertions.json | jq '.[][]' | grep assertionDetailsModeIdentifier | tail -1 | cut -d'"' -f4)

sketchybar --set $NAME label="$SOURCE"

But when ran in the terminal, this is the output.

This is the sketchybar code

sketchybar --add       item               focus right                                                 \
           --set       focus              script="$PLUGIN_DIR/focus.sh"                               \
                                          width=30                                                    \
                                          label.padding_left=-10                                      \
                                          label.font="$FONT:Bold:12"                                  \
                                          update_freq=3                                               \

And when setting the label to a constant string it will show

[FelixKratz]

This seems to work without any problems. Try running sketchybar from the commandline and see the error message output. Also check the item properties when sketchybar is running with sketchybar --query focus