“Authentication Error Manager – Connection lost”

[vivek-devadiga]

I am using STM32CubeIDE version 1.19.0, and I am encountering a network-related issue.

Problem

I receive the error:
“Authentication Error Manager – Connection lost”

Troubleshooting done

• Verified that my internet connection is working properly

• Tried using a mobile hotspot instead of Wi-Fi

• Checked connectivity in the Firmware Updater (status shows OK)

System details

• OS: Windows 11 Pro 

• Laptop: Lenovo ThinkPad T14

• Board: STM32F407VGT6 / STM32F407 Discovery

Additional context

Even though the Firmware Updater indicates a valid connection, the authentication error still occurs across different network setups.

Question

What could be the cause of this authentication/connection issue in STM32CubeIDE, and what steps can be taken to resolve it?

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[Ghofrane GSOURI · Accepted solution]

Hello @vivek-devadiga @Libelelang @Andrew Neil 

The issue has been resolved. Could you please verify it on your end?

THX

Ghofrane