trainline stacktrace

Exception in queued GPT command TypeError: t is undefined
Stack trace:
u@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:2861
init/</</<@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3407
Pl.prototype.push@https://securepubads.g.doubleclick.net/gpt/pubads_impl_118.js:55:496
P/<@https://securepubads.g.doubleclick.net/gpt/pubads_impl_118.js:55:79
init/</<@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3371
u@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14493
add@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14809
onAppInitialized@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:8:17169
init/<@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3247
u@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14493
fireWith@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:15315
Deferred/</o[a[0]]@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:16291
h<@https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3105
nrWrapper@https://www.thetrainline.com/buytickets/travelessentials.aspx?showUpgrades=True&prevMatrix=CombinedMatrix:8:11493
  pubads_impl_118.js:55:577
	Pl.prototype.push https://securepubads.g.doubleclick.net/gpt/pubads_impl_118.js:55:577
	P/< https://securepubads.g.doubleclick.net/gpt/pubads_impl_118.js:55:79
	init/</< https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3371
	u https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14493
	add https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14809
	onAppInitialized https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:8:17169
	init/< https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3247
	u https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:14493
	fireWith https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:15315
	Deferred/</o[a[0]] https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:2:16291
	h< https://www.thetrainline.com/buytickets/Scripts/dist/common.6.00.237.js:22:3105
	nrWrapper https://www.thetrainline.com/buytickets/travelessentials.aspx:8:11493