This is due to the library we use in the project sidebar to handle the key events, see upstream bug: https://github.com/vueuse/vueuse/issues/1128
Trace:
{
"message": "Uncaught TypeError: Cannot read properties of undefined (reading 'toLowerCase')",
"source": "https://tuleap.example.com/assets/core/burning-parrot-4170042be2545beab451.js",
"lineno": 6,
"colno": 93112,
"error": [],
"href": "https://tuleap.example.com/plugins/document/example/search/129?q=%2a",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36",
"user-id": 156
}