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Associate
May 9, 2026
Solved

Error downloading the following files: api_config.json (Not Available)

  • May 9, 2026
  • 7 replies
  • 1771 views

This error pops up everytime I try creating a new STM32 project when downloading the selected files during the first stages of creating a project. My internet connection is fine and this wasn't an issue some weeks back with the last project I created. Any assistance on this issue from anyone will be very helpful because I'm a quite a newbie to CubeIDE. Thanks.

Best answer by Adison112

I think this problem is caused by new update. I've been working in Cube for several years but I've never updated the software. After replacing CubeMX with newer it works fine. 

7 replies

Associate II
May 10, 2026

Having the same issue

Explorer
May 10, 2026

Same to me

 

Explorer II
May 12, 2026

same here

Adison112Best answer
Explorer
May 12, 2026

I think this problem is caused by new update. I've been working in Cube for several years but I've never updated the software. After replacing CubeMX with newer it works fine. 

Marvin_kAuthor
Associate
May 12, 2026

I was still able to build my project and flash the MCU after clicking the box away, so it didn't end up really interfering this time. I feel that I'll eventually run into some project that'll need those missing files though. Anyway, I also haven't updated my CubeIDE so that might be it. 

Associate
May 12, 2026

Same problem, happens also with creating new project from existing .ioc file. After the download fails project creation menu appears but IDE gets stuck in Progress Information tab and nothing is clickable. I'm using CubeIDE v1.19.

Associate
May 12, 2026

Quick update: When I did not click OK to api_config.json error it disappeared on its own and I was able to create a project. Then I downloaded firmware packages I needed from MX UI (manage software packages)