AttributeError: module 'enum' has no attribute 'IntFlag'

[Luxtech]

What kind of issue is this? Problem while compiling firmware for SKR-e3 3d printer board

Configuration

Operating system: Fedora 32 PlatformIO Version (platformio --version): 5.1.1. (installed with pip3)

Description of problem

I tried to compile 3d printer firmware for my SKR-E3 3d printer board and got the following error: AttributeError: module 'enum' has no attribute 'IntFlag'

Steps to Reproduce

1. clone the firmware that uses platformio from the repository: https://github.com/bigtreetech/BIGTREETECH-SKR-E3-DIP-V1.0/tree/master/Firmware
2. run the following command: platformio run in the following folder: BIGTREETECH-SKR-E3-DIP-V1.0/Firmware/Marlin-2.0.7.2-SKR-E3-DIP/ (where the platformio.ini file is located)

Actual Results

the following error: Traceback (most recent call last): File "/home/lux/.platformio/packages/tool-scons/scons.py", line 87, in <module> import SCons.Script File "/home/lux/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Script/__init__.py", line 71, in <module> import SCons.Action File "/home/lux/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Action.py", line 104, in <module> import pickle File "/usr/lib64/python3.8/pickle.py", line 34, in <module> import re File "/usr/lib64/python3.8/re.py", line 145, in <module> class RegexFlag(enum.IntFlag): AttributeError: module 'enum' has no attribute 'IntFlag'

Expected Results

A compiled binary file

If problems with PlatformIO Build System:

The content of platformio.ini:

https://github.com/bigtreetech/BIGTREETECH-SKR-E3-DIP-V1.0/blob/master/Firmware/Marlin-2.0.7.2-SKR-E3-DIP/platformio.ini

Source file to reproduce issue:

https://github.com/bigtreetech/BIGTREETECH-SKR-E3-DIP-V1.0/tree/master/Firmware 

[ivankravets]

Please forward to https://community.platformio.org/