@vidpix welcome to MyController 🙂
if you use labels as filter append labels. as prefix of the key.
samples: labels.ms_node_id, labels.ms_sensor_id

in the filter key you can choose anything. you can easily understand if you see yaml view of a field.

@NielBierman My guess you have downloaded wrong arch executable.
if your OS is x86_64 download mycontroller-server-*-linux-amd64.tar.gz

To know OS arch run the command: uname -m