EXCLUSIVE: Taylor Swift fans have been concerned about her upcoming shows after she was forced to cancel all three Vienna nights due to an “alleged terror attack”. But an expert has revealed to Celebrity Tidbit that her security team will be doing everything they can to make sure fans feel safe. It’s been a tough few weeks for Taylor Swift and her fans after the star was forced to cancel all three nights of The Eras Tour at Vienna, due to an “alleged terror attack”. Tay-Tay revealed a ‘terror attack’ was her biggest fear when traveling promoting her music before her record-breaking tour was ta…