HA crashing after adding aarlo

Yesterday I added aarlo to my HA and after that I have had problems.
My HA is a RP 3B with an SD card to boot from. I guess many of you use this so I didn’t think hardware was the reason it has started crashing after the aarlo install.
Is this a very demanding integration?

I boot up HA and it seems to work fine for a little while, but after 30-60 minutes I can’t connect to it anymore. I don’t know how hot a HA RP usually runs, but I think it is a lottle hot in the original case.

I also hooked up the RP to a monitor and it seems fine with the HA startup screen showing. A little thermometer is showing up in the top right corner once in a while an disappears again.

I guess I should reboot it again, try and remove aarlo and see if that helps, but does anyone have an idea why this suddently started happening right after the aarlo install?

Edit:
After a while the HA starter screen showed some messages. What does the bottom three lines mean? It keeps repeating them after a set amount of time.

Edit 2:
Now it is saying:
“hwmon hwmon1: Undervoltage detected!”

That says that your power supply isn’t sufficient. Switch to a proper Pi3 rated power supply (not a mobile charger).

I am using the original Pi3 PSU. I have always used this.

Well, it looks like it’s not up to the job of powering the Pi, so it’s time to replace it, or move to a better platform.

I don’t know if that message will repeat if the problems continues, but it did not show any more then those two times. I will restart the Pi and see if it does the same again.
It is just funny that I have used this Pi for a few years for other projects just fine and also it worked fine before yesterday after I did all the stuff with aarlo.
It may be a coincidence, but a wierd one if so.