Definitely a mismatch of the version of rclone binary you run and your CPU. ARM versions are a bit of a mess, and there was some inconsistencies in rclone's ARM builds some time ago that was cleaned up (there are a lot details in a closed PR if you want details). Try the latest "ARMv5 - 32 Bit NOHF" version, I'm pretty sure that will run. Then you can try v6 and v7 to see where it stops, if you care.