Error occured when downloading .sof into device

Hi,

Thank you for contacting Intel community.

1. You can check the error and workaround for Quartus Pro 20.2 in the link below:

https://www.intel.com/content/www/us/en/programmable/quartushelp/20.2/index.htm#quartus/gl_quartus_welcome.htm

2.On top of that, please try to use latest version of Quartus Pro. Users should upgrade to the latest version of the Quartus.

https://fpgasoftware.intel.com/20.2/?edition=pro&platform=windows

Let me know if you need further information.

Regards,

Aiman