We don’t support PlatformIO Core 4.0. The projects written for the previous PlatformIO Core versions are fully compatible with PlatformIO Core 5.0. It was not our wish to kill PlatformIO Core 4.0. See the reason Custom platform packageRepositories alternative? 4.3.x continued support? - #3 by ivankravets
All data have been moved to the EU with PlatformIO Core 5.0. Please upgrade PlatformIO Core to 5.0. I recommend using our installation script instead of native Linux packages. See Redirecting...
You can use your Python package manager and install PlatformIO Core via pip install --user platformio.