This seems to be a known problem in their github:
Also, could you show me the steps you performed to reproduce the issue?
I've been following the github instructions to install the theme and I executed the compilation of the theme with the instructions of the Bitnami guide :
sudo SERVICE_VARIANT=lms ./bin/paver.edxapp update_assets lms --settings=aws
To compile the assets you must stop the edx instance with
sudo /opt/bitnami/ctlscript.sh stop and
sudo /opt/bitnami/ctlscript.sh start mysql to leave the mysql server running to perform the operations in the DB.