A systems administrator disabled TLS 1.0 and 1.1, as well as RC4, 3DES, and AES-128 ciphers for TLS 1.2, on a web server. A client now reports being unable to access the web server, but the administrator verifies that the server is online, the web service is running, and other users can reach the server as well. Which of the following should the administrator recommend the user to do FIRST?

A. Disable antivirus/anti-malware software.
B. Turn off the software firewall.
C. Establish a VPN tunnel between the computer and the web server.
D. Update the web browser to the latest version.