Can you give me a valid address to your website, WP Admin Username, and Password in the private reply (Check the “Set as private reply” checkbox below the post).
After deactivating all plugins theme has been registered without any issue… some plugin(s) was blocking the registration process.
Now you will need to re-enable plugins you will be using but I must notify you that all those plugins are slowing your website loading speed allot so try to reduce active plugins only at those you really need.