Invalid public key:error:0480006C:PEM routines::no start line: iostream error roku

Hi team, please your help with the follow error:

Invalid public key:error:0480006C:PEM routines::no start line: iostream error roku

my device is 3930x, I do the steps:
reboot
reinstall developers mode
factory reset, hard factory reset. but the error is the same when click rekey in developmnet mode utils.

When did this error start showing up? Did it happen right after a reset or were you already sideloading normally before it suddenly appeared? Knowing if it started after an update, a factory reset, or a browser change can help figure out whether the dev-key got corrupted or the Rekey request isn’t being sent correctly. Let me know what happened right before the error showed up and we can narrow it down.