H1P2P program has a userid of admin and a password you should set in order to make changes on the HiP2P program. Don't get this confused with the password that each camera needs.
Using your app on your phone changed the password to the camera so now you need to get in sync on the HiP2P program. Go the Device mgmt panel and click on the camera you want to access and the login prompt will have the password in *** as it was last entered- you need to type again in the password & click OK. Be sure the password is the same as the phone app's password for the same camera.
Sometimes your phone app updates wipe over your real password and giving a defaulted password hidden behind the ***. It should not do this but it happens depending on who made the update changes.