My Office 365 account ask for admin validation

As you can see on the screen, your O365 security rule is asking for an admin to validate Automatic Email Manager for the first time it is used under your organization or depending on the security for your own account.

So, you have to connect first with an admin account, valid the use of Automatic Email Manager, then use your regular account.

For information:
https://docs.microsoft.com/en-us/microsoft-365/admin/misc/user-consent?view=o365-worldwide

Or you can change the settings in your O365 account and enable the user to accept or no the consent:

1. Sign into your Office365 administrator account.

2. Click Settings > Org Settings.

3. In User consent to apps, ensure checkbox is ticked.