Why can't I select a product variant on my website?

[BlueMoonSwim]

I go to my website to select a variant and it won’t let me! Please help it’s urgent:( ,y website is www.bluemoon-swim.com

[Guleria]

Hello @BlueMoonSwim ,

There is no error in the console so it's hard to say what's the issue.
I suggest reverting the recent changes you did or use an updated theme or call your developer to check the issue.   

Thanks

[BlueMoonSwim]

Hi thank you for your feedback. so i just switched to the dawn theme and i just changed the code so i can show color swatching on my product pages. that was the only recent change. i figured it might be that, so i went back and reversed the code. but i still cant select a variant. 

so i tested out my old theme from last week which was studio, and it is now allowing me to select my variant. 

do you have any suggestions? i don't have a developer, i do everything on my own at the moment.