Thank you for your reply.
In attempting to provide the info you requested, I decided to start from beginning - since I had tried so many repositories in the past, I had no confidence I could supply accurate info for you. Therefore, I downloaded the Marlin 2.0.3 firmware from (Download | Marlin Firmware) and the configuration file as well. From PlatformIO I was able to compile a firmware,bin file as before but this time I was also able to successfully flash it to the BTT SKR mini E3 V1.2 board on an Ender 3. Seems that I must have been doing something incorrectly but unfortunately I don’t know why I previously was having the problem described.
Thank you for your timely communication and prompting a resolution.
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