Tablet/Mobile - Chat plugin: Buttons doesn't work properly

Dear support team,

1. Button “Available/offline” is reflected on members list. It’s showed for each user including myself when I visit site from PC. But when I visit site from tablet or mobile (iPhone) the button is available only for friends.

2. Second issue is that I’m transferred to not found page instead of chat pop-up form by clicking on the button from mobile/tablet or from PC but second user on mobile/tablet.

Please advise how to fix it.

thank you,
Anton