Access Community Builder: From the All Communities page in Setup, click Builder next to the community name. From a community, click CommunityBuilder in the profile menu.
Go to the System Administrator profile and check for the community permissions like manage communiteties and etc and add all the permision To create, customize, or publish a community:Create and Set Up Communities AND View Setup and Configuration permisson are required
https://help.salesforce.com/articleView?id=networks_enable_public_access.htm&type=5
Go to the System Administrator profile and check for the community permissions like manage communiteties and etc and add all the permision
To create, customize, or publish a community:Create and Set Up Communities AND View Setup and Configuration permisson are required