Same problem for me. I can chose a png file, then when I click create theme, I got the sudo password request in small windows, and that enter a loop... until it exit, the theme is never created and cannot be installed.
Same problem for me. I can chose a png file, then when I click create theme, I got the sudo password request in small windows, and that enter a loop... until it exit, the theme is never created and cannot be installed.