Signature method RSA_SHA1 forbidden by configuration

[TimSC]

I'm trying to run the example. I'm using python Python 3.10.6 and pyOpenSSL-23.1.1.

127.0.0.1 - - [13/May/2023 00:19:30] "POST /saml/acs/ HTTP/1.1" 500 -
Traceback (most recent call last):
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 2213, in call
return self.wsgi_app(environ, start_response)
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 2193, in wsgi_app
response = self.handle_exception(e)
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 2190, in wsgi_app
response = self.full_dispatch_request()
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 1486, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/views.py", line 109, in view
return current_app.ensure_sync(self.dispatch_request)(**kwargs)
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/flask/views.py", line 190, in dispatch_request
return current_app.ensure_sync(meth)(**kwargs)
File "/home/tim/dev/flask-saml2/flask_saml2/sp/views.py", line 86, in post
response = handler.get_response_parser(saml_request)
File "/home/tim/dev/flask-saml2/flask_saml2/sp/idphandler.py", line 220, in get_response_parser
return ResponseParser(
File "/home/tim/dev/flask-saml2/flask_saml2/xml_parser.py", line 44, in init
self.xml_tree = self.parse_signed(self.xml_tree, self.certificate)
File "/home/tim/dev/flask-saml2/flask_saml2/xml_parser.py", line 73, in parse_signed
return XMLVerifier().verify(xml_tree, x509_cert=certificate).signed_xml
File "/home/tim/dev/flask-saml2/venv/lib/python3.10/site-packages/signxml/verifier.py", line 350, in verify
raise InvalidInput(f"Signature method {signature_alg.name} forbidden by configuration")
signxml.exceptions.InvalidInput: Signature method RSA_SHA1 forbidden by configuration