no output with single WS2812 module

[gitterman]

I built a 4 LED Module and wired it to an arduino nano according to https://create.arduino.cc/projecthub/laserbrain/arduino-controlled-artificial-candle-lights-65a46d.
I tested the module with a modified example sketch and it works as it should i.e. all 4 LEDs could be addressed and programmed.
Then I compiled the atrium lighting and set both STRIP_x_MODULE_COUNT to 1.
The compilation gave no errors but the module does not get updated.
It still shows the pattern from the example sketch.
It seems that the data output to port 5 or 6 is just not sent.
Is there a hidden setting I need to do or some debugging hints to solve the issue?

[emmellsoft]

Hi Gitterman! No; there is no other magic... The STRIP_x_MODULE_COUNT also isn't that vital -- if you are having a larger number here than actual LEDs, the extra ones will be ignored. (The program will try to light them, but nothing will happen since they doesn't exist. There will not be an error.)
Otherwise just ensure you have connected your LEDs to pin 5 and 6 (or one of them if you only have one module) -- och change the pin definition if you connect it somewhere else.