BUG #16221: ERROR while importing Plpython , pltcl

The following bug has been logged on the website:

Bug reference:      16221
Logged by:          kalyan singh
Email address:      kalyan.singh@capgemini.com
PostgreSQL version: 11.0
Operating system:   WINDOWS 10
Description:

We are trying to import  “plpythonu” in postgresql  but when running the
below query we are getting an error:-
CREATE EXTENSION plpythonu
 ERROR:  could not load library "C:/Program
Files/PostgreSQL/11/lib/plpython2.dll": The specified module could not be
found.
Although I have “plpython2.dll” is there in the same location.
I have tried CREATE EXTENSION plpythonu3  getting same error although I have
all the  .control file in the expected location.
I have also tried to import pltcl but getting same error.
My python version is -3.8

Can you please help us to overcome this issue.
Need this because we need to send mail through a procedure in postgresql.