1. Modules are hidden, as it claims, but the module position stays (doesn't collapse). I just see an empty box.
2. My module position CSS is dropped completely for the position I place it in, and reset to nothing (perhaps defaults). Clearing the "-flush" class prefix in the Ninja module does nothing (keeps putting it back), so I had to put a space in the box to keep it empty.
In the end, I couldn't make it work with my CSS, disabled it (waste of money at the moment, but hopefully future versions will have it all fixed).
The issue is definitely not in Art Adminer, but in .htaccess file on your server that disabled access. You may want to get some knowledge in access to folders and files that is used on your server.
Thousands of users use Art Adminer without issues, there were 2-3 people who got it disabled by .htaccess on their server - we helped them within 24 hours after they contacted us.
All you need before leaving a review about 'non-working' component is to have a look at our forum or just contact us.