Why am I getting the error “You have exceeded the maximum login limit”?

Seems like you are already logged into the maximum number of logins allowed against your subscription.

You would need to login to your account using the website URL www.easytoinspect.com and go to Manage devices in your account menu.

Remove the unused devices from there (considering a maximum of 2 device logins as is the limit for your subscription).

Once removed, you would then be able to login from a new device.