If you are installing a WordPress theme via the theme installer and get a message that says “Are you sure you want to do this?”, it’s likely thay your web server is configured with PHP settings that are too low to allow the theme ZIP file to upload. Specifically, PHP is configured to a maximum file upload size limit at 8 megabytes or less. The theme ZIP is about 9.5 megabytes in size. Thus, the web server is rejecting the upload. WordPress is giving you a rather ambiguous message in response. This is not a theme fault or bug.
We recommend that you either upload your theme via an FTP client or reconfigure your php settings as below:
- max_execution_time 60
- memory_limit 128M
- post_max_size 32M
- upload_max_filesize 32M