The plugin can’t update my Themes any more, API works fine, and I have received the updates, but when I click the “Update Available” as usual, there is no response. Please help, Thanks
Please contact theme author and let them know about it. as you mentioned api works fine then it should update the theme to latest version. Also you can check your wp dashboard theme current version and then go to themeforest theme page and check changelog to see the latest version number.