In the latest sign that reducing headcount by 80 percent has impacted Twitter’s operations, on Monday, all links on the platform appeared to stop working and instead directed users to an error page. “This platform is so brittle (sigh),” wrote company owner Elon Musk, in between replies to tweets about “woke ideology,” transgender athletes, and other hot-button topics. The issue persisted for more than an hour before it was fixed. During that period, users also had trouble uploading and viewing images.