An error has occured while using the translation provider Google Cloud Translation API : The remote server has returned an error: (403) Forbidden

Hello,

We're a translation agency and we're having an issue with the Google API on Trados Studio 2019 (Windows 10). We get the following error code:
"An error has occured while using the translation provider Google Cloud Translation API : The remote server has returned an error: (403) Forbidden".

Our billing method is up to date, we've updated Trados, created a new API key, deactivated VPNs... Any idea what's going on? Thank you in advance :)