It is better to clear the pycache files(if any present) before running the following commands.
TERMINAL
sajha-aawaj> npm install
pip install -r requirements.txt
npm run dev
sajha-aawaj/sajha_aawaj>
python manage.py makemigrations voicelines
python manage.py migrate
python manage.py runserver
If on linux use command 'npm rebuild' before 'npm run dev'