i need help with the hydra command

Can anyone help me regarding this command hydra -s 80 -l admin -P /root/Desktop/wl/cctvpass.txt -e ns -t 16 http-post-form Hydra v9.0 (c) 2019 by van Hauser/THC – Please do not use in military or secret service organizations, or for illegal purposes. After I executed the command this is what came out Hydra (https://github.com/vanhauser-thc/thc-hydra) starting at 2020-09-11 15:58:42 [WARNING] You must supply the web page as an additional option or via -m, default path set to / [ERROR] the variables argument needs at least the strings ^USER^, ^PASS^, ^USER64^ or ^PASS64^: (null) I start at hydra and try to learn