The portal is the online account (web site).
What is the date of the firmware? With the camera in setup, third tab, scroll down to Information.
Does the camera pass the Hello test? Again, in setup (after it is connected to the network), fourth tab, scroll down to Diagnostics. While you are on that tab, confirm that the camera is set to Instant send and Premium.
When you take/send a photo manually, what does the screen say? It should say setting, sending, sent.
The getting hot does not sound good.
Can you try a different SD card? I use SanDisk or Kingston. Did you format the card in the camera?