I also get the same Error but with a different situation
The error mentioned below:
2020-05-04 09:59:50,785: Error running WSGI application
2020-05-04 09:59:50,797: OSError: [Errno 98] Address already in use
2020-05-04 09:59:50,797: File "/var/www/amanojha_pythonanywhere_com_wsgi.py", line 16, in <module>
2020-05-04 09:59:50,797: from manage import application as app # noqa
2020-05-04 09:59:50,798:
2020-05-04 09:59:50,798: File "/home/amanojha/mysite/manage.py", line 157, in <module>
2020-05-04 09:59:50,798: application.run()
2020-05-04 09:59:50,798:
2020-05-04 09:59:50,798: File "/home/amanojha/.virtualenvs/flask/lib/python3.7/site-packages/flask/app.py", line 990, in run
2020-05-04 09:59:50,799: run_simple(host, port, self, **options)
2020-05-04 09:59:50,799:
2020-05-04 09:59:50,799: File "/home/amanojha/.virtualenvs/flask/lib/python3.7/site-packages/werkzeug/serving.py", line 1052, in run_simple
2020-05-04 09:59:50,800: inner()
2020-05-04 09:59:50,800:
2020-05-04 09:59:50,800: File "/home/amanojha/.virtualenvs/flask/lib/python3.7/site-packages/werkzeug/serving.py", line 1005, in inner
2020-05-04 09:59:50,800: fd=fd,
2020-05-04 09:59:50,800:
2020-05-04 09:59:50,801: File "/home/amanojha/.virtualenvs/flask/lib/python3.7/site-packages/werkzeug/serving.py", line 848, in make_server
2020-05-04 09:59:50,801: host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
2020-05-04 09:59:50,801:
2020-05-04 09:59:50,801: File "/home/amanojha/.virtualenvs/flask/lib/python3.7/site-packages/werkzeug/serving.py", line 740, in init
2020-05-04 09:59:50,801: HTTPServer.init(self, server_address, handler)
2020-05-04 09:59:50,801:
2020-05-04 09:59:50,801: File "/usr/lib/python3.7/socketserver.py", line 452, in init
2020-05-04 09:59:50,802: self.server_bind()
2020-05-04 09:59:50,802:
2020-05-04 09:59:50,802: File "/usr/lib/python3.7/http/server.py", line 137, in server_bind
2020-05-04 09:59:50,802: socketserver.TCPServer.server_bind(self)
2020-05-04 09:59:50,802:
2020-05-04 09:59:50,803: File "/usr/lib/python3.7/socketserver.py", line 466, in server_bind
2020-05-04 09:59:50,803: self.socket.bind(self.server_address)