Start by checking your username, password, and internet connection. If those are correct, confirm that you can access your FamilySearch account independently. This helps determine whether the problem is account-related or connected to your FTM setup. You should also check that Family Tree Maker is running a current version. If the problem continues, note the exact error message and when it appears. Avoid making unnecessary changes to your family tree while troubleshooting. A recent backup of your FTM project can help protect your genealogy information while you investigate the FamilySearch Login problem.