"Hi Alex, sorry to hear you're having trouble with GlobalProtect. Can you please try to download and install the latest version of the GlobalProtect client from our company's website?" Ryan asked.

After some investigation, Ryan discovered that one of the CAs had indeed expired, causing the certificate verification to fail. He quickly generated a new certificate and sent it to Alex.

"I think I know what might be causing the issue," Ryan said. "If your laptop's clock is not in sync with our servers, the certificate verification will fail."

Alex tried to reconnect several times, thinking it was just a minor glitch, but the error persisted. She checked her internet connection, made sure her username and password were correct, and even restarted her laptop, but nothing seemed to work.

Frustrated, Alex reached out to her company's IT department, hoping they could help her resolve the issue quickly. Her ticket was assigned to a helpful IT specialist named Ryan, who responded promptly.

As the day went on, Alex began to worry that she might not be able to meet her deadlines. Ryan, sensing her frustration, decided to dig deeper.