ESP8266 WLED flashing fails and old version won't erase

Customer:

I have a problem with an ESP8266 device. I’m trying to flash WLED onto it but it’s failing, and I need to remove the old version of WLED from the ESP.

Original message (Croatian)

Imam problem sa vašim ESP8266 uređajem. Pokušavam flashati WLED program na njega no ne uspjeva mi i kako da se riješim stare verzije WLEDa sa ESPa

Originally submitted via email support on 14 February 2024. Migrated to the forum for community visibility.

Soldered Support:

Which device are you using - Dasduino Connect or Croduino?

The issue is likely with the board definition. You need to install the correct board definition from one of these:

Original message (Croatian)

Je li riječ o Dasduino Connect ili Croduino uređaju? Možeš li mi poslati točan model, tako ti bolje mogu pomoći riješiti problem.

Mislim da je stvar u Board definitionu, trebaš instalirati točan board definition, i jedan je od ova dva:

Croduino-Board-Definitions-for-Arduino-IDE/package_Croduino_Boards_index.json at master · SolderedElectronics/Croduino-Board-Definitions-for-Arduino-IDE · GitHub

GitHub - SolderedElectronics/Dasduino-Board-Definitions-for-Arduino-IDE · GitHub