Hik-Connect and Email Notification Issues on DVR

[pancake1321]

Hey there... I am super new to this forum, (along with being not-so-techy) so bear with me here...

I am having issues setting up my Hik-Connect app and notification emails. One out of three DVR's is working just fine with both emails and Hik-Connect app.

I use the following DVR models:

1. DS-7716NI-SP/16 - Emails working, Connect not working
2. DS-7332HGHI-SH - Neither Emails nor Connect are working
3. DS-7216HGHI-SH - Both Emails and Connect are working

Under the System Configuration - Network - Platform Access tab, the Status reads Offline (Connecting server failed)

Any ideas to remedy this?

Let me know if I need to provide more information.. Like I said, I am not very "technologically advanced" so I am unsure what information I should provide!

-Thank you!!!