1. A valid sendle/aramex account is added
2. Joovii shipping is added to the proper shipping zone
3. Product weight is added
4. A valid customer address is added in the checkout
5. Check the following server settings to prevent curl execution time out
max_execution_time = 60
max_input_time = 300
memory_limit = 256M
post_max_size = 128M
upload_max_size = 128M