My Base Url is as follows:-
/etc/mailman3/hyperkitty.cfg * [general] # The base URL of your HyperKitty web interface base_url = http://list1.iitm.ac.in/hyperkitty/
#archives #archives = /etc/mailman3/hyperkitty.cfg
# API key for HyperKitty to access Mailman 3 api_key = n/ZZnR5bRgNdUEyNK4p731C1+gWJLw0/
# Whether to verify SSL certificates when connecting to Mailman 3 API verify_ssl = false
# Log file for HyperKitty log_file = /var/log/mailman3/hyperkitty.log
# Log level: DEBUG, INFO, WARNING, ERROR log_level = DEBUG
# Optional: Mailman 3 REST API settings if needed #mailman_rest_api_url = http://localhost:8001 #mailman_rest_api_user = restadmin #mailman_rest_api_pass = /EqNGU+Mj8udFpw4ueIkhWXzAy3kJIy17wwzChrXb3P8Vh4e After changing it to http also it is not working.