Blank webpage

[workdk]

I was trying to add another subdomain but instead changed my original one. I then reverted it back to the original subdomain but the webpage has not returned. How do I fix this?

 

[DefecTalisman]

How did you go about this ?

Did you change it in cPanel or hosting panel ?

 

[Fedlerner]

Also provide more information.
What was your main domain before your change and what you changed it for.