After increasing web-access security on a WLAN controller, an engineer has IP connectivity but cannot open the controller's web management session from a browser. Which action resolves the issue?

The correct action is to use a browser that supports 128-bit or stronger TLS ciphers. Modern WLAN controllers, especially after security enhancements, often require strong encryption protocols for web management access. If the browser or its configuration only supports weaker or outdated TLS ciphers, the connection will fail, even with IP connectivity. Disabling Adobe Flash Player is irrelevant as modern web interfaces do not rely on it. Opening a private/incognito window does not change the browser's underlying TLS cipher support. Disabling JavaScript would likely break the web interface functionality rather than resolve a connection issue.