WotLK Icecrown | 'The Last Line Of Defense' bug

[Bakertron]

In Icecrown there is a quest called 'The Last Line Of Defense' where you have to use turrets to kill a bunch of scourge and a few Frostwyrms except the turrets are stuck in these wooden poles and you can't attack anything.

Please help.

This is on the 'Icecrown' realm.

https://imgur.com/a/QbCY2rU

Thanks.