Board seems to power off immediately after power is applied

[SoLongSidekick]

So my unit is brand new and upon plugging the USB plug into a power source the power LED blinks once and then never shows up again. I have the files on an SD card, does it have to be formatted a specific way? Or is my board just DOA

EDIT - OK so upon further investigation I guess I'm not positive it's powering off immediately after powering up, but the LED does only blink once and no WiFi AP is presented. Also, I'm running into this issue when trying to compile the firmware in Arduino: Compilation error: 'virtual bool SPIFFSEditor::canHandle(AsyncWebServerRequest*)' marked 'override', but does not override

Anyone have any idea what the problem is? And Yes, I made the 1 to 0 and 0 to 1 edits in the two library files.

[SoLongSidekick]

Anyone have any idea?

What is the expected behavior of the board (LEDs, buzzers, etc.) upon powering up?

[SoLongSidekick]

Purchased a second unit and it does the same thing. Identified by my PC but no LED activity and no WIFI hotspot. Really love the support behind this product, you know, like the most basic of basic instructions on how to turn the thing on or what the buttons do.