Follow these steps to help troubleshoot your issue:

1. Force restart your device. Press and hold the power button until you see the logo, then release the button.
2. Try safe mode, as this can help identify any recent downloads or changes that could be the cause.
3. Check your device's storage. Consider deleting unnecessary photos, videos, apps, and other files to make more room.
4. Check for potential viruses or malware. You can use a reputable antivirus app to scan your device.
5. Consider a factory reset. This should only be done as a last resort if nothing else works, as it will erase all content on your device.