Unable to compile Marlin-2.1.x-MPMDv2

[piberry]

Hi!
I´m trying to compile Marlin-2.1.x-MPMDv2 in VS Code with Platformio v3.3.1 and Auto Build Marlin
v2.1.45, also tried with older versions of Platformio and a sugested fix (copy over marlin.py from latest marlin or manually edit the file to add .copy) but it always fails with the same error. Please help, thanks!

Edit: I can compile the default branch (2.1.x) without any problem.

RuntimeError: deque mutated during iteration:
File "C:\Users\user.platformio\penv\Lib\site-packages\platformio\builder\main.py", line 182:
env.SConscript(env.GetExtraScripts("post"), exports="env")
File "C:\Users\user.platformio\packages\tool-scons\scons-local-4.5.2\SCons\Script\SConscript.py", line 598:
return _SConscript(self.fs, *files, **subst_kw)
File "C:\Users\user.platformio\packages\tool-scons\scons-local-4.5.2\SCons\Script\SConscript.py", line 285:
exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
File "C:\Marlin-2.1.x-MPMDv2\buildroot\share\PlatformIO\scripts\WEEDOR83.py", line 5:
for define in env['CPPDEFINES']:

[piberry]

I was able to fix the issue after a lot of trial and error. Here is what worked for me.
In PlatformIO, open PlatformIO Core CLI and enter:

pip uninstall platformio
pip install "platformio==6.1.6"