Hello super_powerK9,
We'd be happy to help. There are a few things you can do to try and resolve the issue.
1) Make sure that your device is up to date. You can learn how to create a backup and update your device here: Update iOS on iPhone - Apple Support
2) Make sure that your iPhone is connected to the internet. You can learn how to do that here: Connect iPhone to the internet - Apple Support
3) Make sure that you know your email address and password. If you do, and you use a common email provider, you can sign out and back in. Add an email account to your iPhone, iPad, or iPod touch - Apple Support
If you have to manually added your email account, make sure it's an IMAP account before removing it to avoid data loss. If you need help, you can look up your email settings here: Mail - Official Apple Support
If the issue continues, we recommend reaching out to Apple Support for more help: Get Support
Thanks.