You need MIT certificates to use this system.
You can get them from the MIT certificate server.

Here is some debugging info that might be useful for Sanjoy to have.

SSL_VERSION_INTERFACE mod_ssl/2.4.10
SSL_SERVER_I_DN_OU InCommon
SSL_CIPHER_EXPORT false
CONTEXT_DOCUMENT_ROOT /afs/athena.mit.edu/user/s/a/sanjoy/web_scripts
SERVER_SOFTWARE Apache
CONTEXT_PREFIX 
SSL_SERVER_A_KEY rsaEncryption
SSL_SERVER_S_DN_ST Massachusetts
SERVER_SIGNATURE 
REQUEST_METHOD GET
SERVER_PROTOCOL HTTP/1.1
SSL_SERVER_S_DN CN=*.scripts.mit.edu,OU=Information Systems & Technology,O=Massachusetts Institute of Technology,street=77 Massachusetts Ave,L=Cambridge,ST=Massachusetts,postalCode=02139,C=US
PATH /usr/local/bin:/usr/bin:/bin
SSL_CIPHER ECDHE-RSA-AES128-GCM-SHA256
SSL_SERVER_V_START Sep 22 00:00:00 2020 GMT
SSL_TLS_SNI sanjoy.scripts.mit.edu
SSL_SESSION_ID 9b7be125c08c33fe749eeb459fc3fe52b2d03c1190251ea705bcadb08f0c3e54
SSL_CLIENT_VERIFY NONE
SSL_SERVER_I_DN_ST MI
HTTP_CONNECTION Keep-Alive
SERVER_NAME sanjoy.scripts.mit.edu
REMOTE_ADDR 34.228.52.223
SSL_CIPHER_ALGKEYSIZE 128
SSL_SECURE_RENEG true
SSL_SERVER_I_DN_C US
SSL_COMPRESS_METHOD NULL
SSL_SERVER_I_DN_L Ann Arbor
SSL_SERVER_I_DN_O Internet2
HOME /afs/athena.mit.edu/user/s/a/sanjoy
SERVER_ADDR 18.4.86.22
DOCUMENT_ROOT /afs/athena.mit.edu/user/s/a/sanjoy/web_scripts
SSL_SERVER_S_DN_OU Information Systems & Technology
SERVER_PORT 444
SSL_VERSION_LIBRARY OpenSSL/1.0.1k-fips
JAVA_TOOL_OPTIONS -Xmx128M
SCRIPT_FILENAME /afs/athena.mit.edu/user/s/a/sanjoy/web_scripts/6.055/view_my_grades.py
SERVER_ADMIN scripts@mit.edu
SSL_SESSION_RESUMED Initial
SSL_SERVER_S_DN_O Massachusetts Institute of Technology
SSL_SERVER_A_SIG sha256WithRSAEncryption
SSL_SERVER_S_DN_L Cambridge
HTTP_HOST sanjoy.scripts.mit.edu:444
SCRIPT_NAME /6.055/view_my_grades.py
HTTPS on
SSL_SERVER_M_VERSION 3
SSL_SERVER_S_DN_C US
REQUEST_URI /6.055/view_my_grades.py
HTTP_ACCEPT text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
SSL_SERVER_M_SERIAL 1F8D8BAB75D2B83977A97C9DED80349A
SSL_CIPHER_USEKEYSIZE 128
HTTP_USER_AGENT CCBot/2.0 (https://commoncrawl.org/faq/)
GATEWAY_INTERFACE CGI/1.1
SSL_SERVER_I_DN_CN InCommon RSA Server CA
REMOTE_PORT 37736
HTTP_ACCEPT_LANGUAGE en-US,en;q=0.5
REQUEST_SCHEME https
SSL_SERVER_V_END Sep 22 23:59:59 2021 GMT
SSL_PROTOCOL TLSv1.2
QUERY_STRING 
SSL_SERVER_S_DN_CN *.scripts.mit.edu
HTTP_ACCEPT_ENCODING br,gzip
SSL_SERVER_I_DN CN=InCommon RSA Server CA,OU=InCommon,O=Internet2,L=Ann Arbor,ST=MI,C=US