Here is a comprehensive, technical guide to addressing this problem through firmware flashing and software troubleshooting, focusing on the U2 binary compatibility.
If the firmware flash does not resolve the issue, it may be a more deeply corrupted partition or a hardware failure. Go to Settings > Apps > Camera . Select Storage and tap Clear Cache and Clear Data . Safe Mode Troubleshooting: samsung-j250f-u2-camera-failed-fix-firmware
Did this issue start after a or an FRP/unlock attempt ? Here is a comprehensive, technical guide to addressing
Press and hold buttons simultaneously.
Restart your device. When the Samsung logo appears, hold until the lock screen appears. "Safe Mode" will appear in the corner. Here is a comprehensive
Press and hold to enter Recovery Mode. Select Wipe Data/Factory Reset . Hardware Check: