Wifi lost

Hello,
I am having a lot of trouble performing the initial configuration of the jackpot3 card on LR4 (it was much easier with the miniRambo on MPCNC).
This is the second time I have lost the card’s WiFi signal (the FluidNC WiFi is no longer visible on either my laptop or my smartphone), even after restarting the card several times. The first time, I flashed the firmware (-> latest version v4.0.1) and was able to reconnect to the card via Wi-Fi. But this time, I can’t see the Wi-Fi network after flashing the firmware. However, everything seems fine in the “Wi-Fi” tab when I connect to the card via USB…
In short, I don’t really know what to do… this card seems very unstable to me…
For your information, the last code I ran was Jason’s code to automate Z-leveling. During the operation, the machine forced the Z-stops once, as if they weren’t working (even though they were working fine at the start of the operation). Then the machine went into standby mode. And the Wi-Fi connection was lost a few minutes later…

There’s a bug in FluidNC that broke this script starting in v3.9.5.

FluidNC v4.0 is not stable yet. Use v3.9.9.

What do you mean by standby mode?

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Okay, thank you very much. I’ll skip this version.
When I say “standby,” it’s because the machine seems to have finished executing the GCode and is waiting for further instructions… which is perfectly normal!

Is your board configured for STA → AP mode?

Yes

So, I tried installing 3.9.4 (to benefit from Jason’s script), then updating the config.yaml files, etc. → WiFi undetectable.

Then I updated 3.9.4 without updating the files → OK.

One of the files must have been corrupted…