Same issue on my side since March 13thg.
I m with a docker solution on RP5
I try to upgrade domoticz (16576)
remove then add the netatmo material
Create a new app in netatmo
and I m still getting the 2025-03-16 15:10:11.915 Error: test: Invalid/no data received (refresh tokens)...
If someone know ...

Hello,

I was also locked out, but I followed the procedure described in this forum post https://www.domoticz.com/forum/viewtopic.php?p=319793#p319793 , and everything is working fine now.

To summarize:

Created a new app on Netatmo
Deactivated the Domoticz app
Entered the new ID and secret
Saved ...

Hello,
Since 2 days I m getting the error
Error: Netatmo: No access granted, check username/password...
Do you know how to bypass it ?
Thanks