Shelly EM - Failure AP mode after Factory Reset

Hello

Shelly EM - power supplied, lost AP Mode while connecting to shelly.cloud, so tryied to factory reset as in manual but can't see anymore device own created network with SSID like "shellyem-....", led on back flashin very slow (rather lighting than bliking), no chance to add device in Shelly app. Can anyone give a clue?

Thanks in advance.

Thanks for reply. I've tried to reset following the manual instructions using the reset button. Seems like relay doesn't respond anymore. Do we have any idea how to do device last check before consumers complaint? I haven't even started using it for its purpose.?