When attempting to link Google as a new Publisher Client Account (PCA), you may find that your credentials are not verified.
This problem can occur when Google Ads does not recognize the Platform’s IP address, and therefore, refuses to verify the account details when they’re added. Google has a system in place whereby it must authorize the use of your Google Ads account within platform’s such as ours, so issues can occasionally occur.
To resolve the problem, you can follow a workaround provided by Google:
Log into your Google Ads account.
To validate that you want to link your Google Ads account into a 3rd party platform, click on this link: https://accounts.google.com/DisplayUnlockCaptcha
Note: After the validation, you need to finish the following steps within 10 minutes.
Log into the application.
Go to Channels > Manage Accounts and add your Google Ads credential.
Click Verify Account.