Tampermonkey: Opera One requires Developer Mode but it's already activated

[Rallex1]

Rallex1 last edited by

Since some days Tampermonkey doesn't execute any scripts (before it was working fine).
Via the TM icon in the symbol bar I can see the right scripts are triggered for a website.
Message from TM: "Please enable developer mode to allow userscript injection. Click hier for more info how to do this."
But developer mode is activated in the extensions maintenance page. Also Javascript is enabled in the settings.

Does anybody have any idea how to solve this?

Configuration: Win11Pro 25H2, Opera One 132.0.5905.11 (current version), TM 5.3.6222 (current version)