Cannot read property 'join' of undefined

[smasinde]

io.on('connection', async (ctx: any, data: any) => {

    console.log(`client has connected...`);
    ctx.socket.join('some_room');
    console.log('ROOMS:::' + ctx.socket.rooms);
})

why? Everything else working...

[bamtheboozle]

having the same issue, any idea what could cause it?