There are few scenarios where you might have issues connecting your Google account to your Method account.
A common solution is to disconnect and reconnect to your Google account, so please follow the below steps:
Step 1: Disconnect Your Google ID from Method.
Step 2: Disconnect Method from Google Account.
Step 3: Link your Google ID with your Method Account.
Step 1: Disconnect Your Google ID from Method
Sign into your Method Account.
Click your Profile icon in the upper right corner and then select User Profile.
This will take you to your User Profile. Select the Connections tab.
Beside the Google service, click the Disconnect button.
Step 1B: Disconnect Your Google ID from Method:Classic
If your account is toggled to log into both Method and the Classic version of Method, you will need to disconnect from Google in your Classic account as well.
Log into Method:Classic.
In the top right corner, click your username.
Under My Profile go to Connected Accounts and click Disconnect beside your Google ID.
Step 2: Disconnect Method from Google Account
Log into the google account you want to connect with Method.
(Try private or incognito mode).Click the App launcher (9 square boxes) and then Account.
Click Security on the left menu.
Scroll down to Your connections to third-party apps & services. If Method isn't listed there, click See all connections.
Search for Method. And then select Method in the resulting list
Click Delete all connections you have with Method.
Confirm your action.
Your account is now disconnected!
Step 3: Link your Google ID with your Method Account
Go to signin.method.me and select Sign in with Google.
You should already be signed into your gmail because of Step 1, so select the gmail account you want to connect with.
If you have multiple accounts, you will need to select one. Either way, you will connect your Google ID with your Method account and you're done!