If you have changed how you handle cookies, that could be the source of the problem. After you enter the code, the site sets a cookie. On each visit to a page on the site, Firefox sends that cookie to prove that your computer is authorized by you. If that cookie gets cleared, well, time to get a new code.

I have everything I can in Options and I'm not sure what I need to do to fix this situation.

Correction

I have tried everything I can in Options and I'm not sure what I need to do to fix this situation.

Let's start with cookie settings.

If you are on the Options page, Privacy & Security section, and you select "Firefox will: use custom settings for history" what do you have set there? For example:

☑ Accept cookies from websites (selected)
Accept third-party cookies: Always
Keep until: they expire
☐ Clear history when Firefox closes (not selected)

Make sure you do not run Firefox in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History).

• https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history

• Options/Preferences -> Privacy & Security -> Firefox will: "Use custom settings for history"
• remove checkmark: [ ] "Always use Private Browsing mode"

• check the permissions for the domain in the currently selected tab in "Tools -> Page Info -> Permissions"
• https://support.mozilla.org/en-US/kb/fix-login-issues-on-websites-require-passwords