Hassio + duckdns unable access to system (local and remote)

Hi!
I installed Hassio v. 083 on my Raspberry Pi3+
I installed a lovelace interface, and set up the automation I needed. The system worked for several months without comment. I decided to provide remote access to the system. I updated the system to version 84.6. After that, I installed the add-on Duckdns for a video instruction.I am using router Keenetic lite 2, port forwarding did as instructed. After installation, I rebooted the system. Now I can not get into the interface. When accessing the address raspberry I see a message “ERR_EMPTY_RESPONSE”.
There is no access through the samba either. In this case, the automation work fine.
How can I restore access to the system? Help!