Hello,
Can somebody tell me what is happening x_x ?

i run this command to install pymysql
pip3 install pymsql

after that
i start flask -> access the url -> got 500 internal server error -> and the error is like the picture bellow.

that's it,sorry my english is pretty limited,
just tell me if you need more information

i'm using:
python 3.8.5
flask 1.1.2