Check your radar status here…
Level 2 data: http://radar2pub.ncep.noaa.gov/
Level 3 data: http://radar3pub.ncep.noaa.gov/
AllisonHouse customers…
Level 2: https://www.allisonhouse.com/pages/status/level2
Level 3: https://www.allisonhouse.com/pages/status/level3
If all are current: try to close and restart your software, followed by your computer. If none of that works, and you’re an AllisonHouse customer, contact AllisonHouse support.