Attempt to access the Ozon.ru website. If the 'Antibot Challenge Page' or any other access restriction is encountered, report that the site is inaccessible. If the main page loads successfully, confirm its accessibility.
Navigate to 'http://ozon.ru/' and observe the loaded page. Determine if the 'Antibot Challenge Page' or any other similar access restriction is present. Report whether the main page is accessible or if access is blocked by a challenge.
The agent clearly states that the 'Antibot Challenge Page' or a similar access restriction was encountered. The agent explicitly states that access to Ozon.ru's main page remains blocked.