Ffmpeg bus error

For Developers
1

In a Netgear R6220 (CPU: MIPS, SoC Type: MediaTek MT7621) after working a few days suddenly gives: bus error.
OpenWrt 21.02.1 firmware. Without any parameter.

root@netgear:~# ffmpeg
Bus error

Reboot. Same. Power off, power on. Same. What to do?