How do I fix the "It seems like you are trying to send this twice" error when logging into my Epic Games account?

In order to fix this error please try the following:

• Attempt accessing the site from an alternate browser.
• Attempt accessing the site from an "Incognito" or "Private" browser.
• Clear your browser's history, cookies, and cache.

You can find how to clear the browser's history, cookies, and cache for some browsers below:

Google Chrome

https://support.google.com/accounts/answer/32050?hl=en

Mozilla Firefox

https://support.mozilla.org/en-US/kb/how-clear-firefox-cache

Opera

https://www.opera.com/case-studies/clean-browser-and-remove-trackers