You're probably using Internet Explorer. FamilySearch.org no longer supports Internet Explorer. See https://www.familysearch.org/ask/salesforce/viewArticle?urlname=FamilySearch-Browser-Compatibility-and-Support-Policy-1381815327313&lang=en
Regardless of the OS you use, our website works with these fully supported browsers:
- Apple Safari—the current version and one previous
- Google Chrome—the current version and one previous
- Microsoft Edge—the current version and one previous
- Mozilla Firefox—the current version and one previous
Normally, Chrome, Safari, Firefox, and Edge update themselves with the latest features, bug fixes, and security patches. If your browser is not set to update itself, you can go to the browser's website to update it yourself.
As of 1 February 2018, FamilySearch.org no longer supports any version of Microsoft Internet Explorer. If you are using Internet Explorer, we encourage you to upgrade to a supported browser. Please see thebrowser upgrade page for more assistance.
I suggest that you install Google Chrome: https://www.google.com/chrome