Hub Link Not Working

Brand new to Hubitat - I installed it a few hours ago, and have experienced two issues which I'll address is separate threads as they are unrelated.

First, I am having a issue with Hub Link. I installed Hub Link on HE and Send Hub Events on ST. Although the switches I selected did appear on HE, they don't work. I looked up some old posts, and followed some suggestions, but had no success. I uninstalled Hub Link and Send Hub Events, then reinstalled both - enabling debugging and sending mode changes.

This is the ST Log (it does not appear to be getting anything from HE):

c529ea57-905d-41b5-912e-ecd8d0a5fc14 7:49:29 PM: debug Setup: POST / HTTP/1.1
HOST: 192.168.0.200:39501
CONTENT-TYPE: text/plain
DEVICE-NETWORK-ID: systemHubLink
CONTENT-LENGTH: 75

s Breezeway Light stHub_0A
s Hall Light stHub_14
s Kitchen Lights stHub_05

The HE log indicates the virtual switches were created and that on/off were pressed. (I tried to copy the log but ran into issues since it contained links).

Would appreciate help on this. I feel like I'm missing something basic.

Going back to the Hub Link logs after posting, I noticed there were now connection errors. This is the Hub Link log (first copied to Notepad to remove the links that prevented me from posting previously):

app:392019-01-29 07:53:01.064 pm warnConnection timed out (Connection timed out)
app:392019-01-29 07:52:59.785 pm warnConnection timed out (Connection timed out)
app:392019-01-29 07:52:56.745 pm warnConnection timed out (Connection timed out)
app:392019-01-29 07:52:53.385 pm warnConnection timed out (Connection timed out)
app:392019-01-29 07:50:53.816 pm infoIP: null, DNI: stHub_14, value: off
app:392019-01-29 07:50:52.387 pm infoIP: null, DNI: stHub_14, value: on
app:392019-01-29 07:50:49.454 pm infoIP: null, DNI: stHub_14, value: off
app:392019-01-29 07:50:46.128 pm infoIP: null, DNI: stHub_14, value: on
app:392019-01-29 07:49:29.392 pm infoLinked Switch, Kitchen Lights, stHub_05, null
app:392019-01-29 07:49:29.389 pm infoLinked Switch, Hall Light, stHub_14, null
app:392019-01-29 07:49:29.386 pm infoLinked Switch, Breezeway Light, stHub_0A, null
app:392019-01-29 07:49:29.261 pm infoLinked Switch, Kitchen Lights, stHub_05, null
app:392019-01-29 07:49:29.215 pm infoLinked Switch, Hall Light, stHub_14, null
app:392019-01-29 07:49:29.139 pm infoLinked Switch, Breezeway Light, stHub_0A, null

Seems like you might have a configuration error. Have you reviewed the docs for Send Hub Events and Hub Link?

I reviewed both docs. (And found an omission in the Send Sub Events doc. Between step 6 and 7 there should be a step to install the Smartapp).

In any case, I had issues with this, with devices responding slowly (all within 15 feet of the hub), with the Dashboard not populating at all, with Virtual Devices not able to control physical... I created a very simple rule in Simple Lighting where one physical switch turns on another - also didn't work. I must have a defective unit. I've requested a replacement from Amazon.