Google doesn’t open while adding gmail account

Not sure what 'cause of problem' is there now. ~Other information

online could help; if you can find pieces, & fit together some actions.

• Add an email account to your iPhone, iPad, or iPod touch - Apple Support

//support.apple.com/en-us/HT201320

• Mail - Official Apple Support

//support.apple.com/mail

You may have to try & settle on adding email account Manually.

If needed, the above main page shows, "Mail Lookup Settings."

Following is mentioned separately; does include an in-article shortcut link:

"Don't see your email provider? tap 'Other' to add your account manually."

Sometimes with gmail, you'd have to 'enter details' until something sticks.

• Gmail - Email by Google on the App Store (for iOS iPhone/iPad)

https://apps.apple.com/us/app/gmail-email-by-google/id422689480

For my iPhone, it's been easier to use 'Google Gmail App' & more than one

gmail account can be loaded; then switched quickly, without extra logins.

(Google services has made big changes to their user environment, too.)

Figure if the Apple Mail login setup, seems unable to comply; a browser can

be helpful to login. ~ Or in the case of iOS, Google has a good iDevice app.

Had considered 'Google as default Mail' in macOS; but they weren't helpful.

Some of my older macs still use newer secure browser login for gmail now.