How do I fix Gmail error 400?

Name: How do I fix Gmail error 400?
Start: 2021-09-14T17:00-00:00
End: 2029-09-23T17:00-00:00
Location: New York

Tue, Sep 14 2021 1:00 PM EDT — Sun, Sep 23 2029 1:00 PM EDT

Tue, Sep 14 2021 1:00 PM — Sun, Sep 23 2029 1:00 PM