You need to sign in to do that
Don't have an account?
Katherine Boothe
Cannot Access Lightning App Builder
Anyone else have trouble finding the Lightning App Builder in their Dev Org? I am on Summer 15, and I was able to enable Lightning Components in Salesforce1, but I do not have the App Builder. Help!
Then it seems like it is not activated for your org. You should open a case with Salesforce
https://help.salesforce.com/HTPortalLogCase
Here are the screenshots for your ref.
Thanks,
Himanshu
All Answers
Try to hit following url with your instance name
https://YOURINSTANCENAMEHERE.lightning.force.com/visualEditor/appBuilder.app
I tried the URL you provided, substituting my instance name from my Dev Org,
https://na24.lightning.force.com/visualEditor/appBuilder.app
and it gave me "URL No Longer Exists".
Any other suggestions would be appreciated! Thanks!
Then it seems like it is not activated for your org. You should open a case with Salesforce
https://help.salesforce.com/HTPortalLogCase
Here are the screenshots for your ref.
Thanks,
Himanshu