I had fixed this issue by installing the python-multipart 0.0.20 in pycharm itself.

make sure you have selected python3.9 and then install the python-multipart

here is the path to install it in pycharm

PycharmProjects/multi_tool_agent->settings -> project (name is mentioned here like multi_tool_agent) -> python Interpreter -> select python multipart 0.0.20