UnknownPackageError: Could not find the package with 'platformio/framework-arduinoststm32 @ ~4.20200.220530' requirements

I am new to Marlin, and I am seeing this error. I downloaded and modified a version for my 3D printer, but when I try to build with VS Code with the platform io extension I keep hitting this error

“UnknownPackageError: Could not find the package with ‘platformio/framework-arduinoststm32 @ ~4.20200.220530’ requirements”

I am not sure if I have an incorrect configuration setting somewhere. I haven’t found this exact issue anywhere yet but I have tried a few basic fixes, which unfortunately none have worked so far.

Has anyone else seen this problem?

Please let me know if more information is needed.

Yes, that version is gone from the PIO Registry. It’s also 4 years old. What Marlin repository and what [env:xxx] are you building such that this errors occurs?