Google API Key (API key configured) but error

Selecting Gemini 2.5 Pro, returns and type something, returns : “An error occurred with the model provider.”

I even tried with an api not restricted at all. (This key can call any API)

“This key is unrestricted. To prevent unauthorised use, we recommend that you restrict where and for which APIs it can be used.”

Do you know why is not working? I do not have any informations if the key is not working or something from the last update when 2.5 Pro was switched to be a PRO model.