Big Sur install errors

After I format internal HDD, start install, at 15 minutes I get error: "The file "index.sproduct" couldn't be saved in the folder "macOS Install Data"." I tried 4 more times, keep getting this error. Sometime I get another error, "An error occurred while preparing the installation. Try running this application again."

I used Dortania's OpenCore Install Guide v 0.6.4.

Any suggestions on how to fix this?

submitted by /u/MarkLaCour
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