Update issue

Goodevening, I’m Luca, i am having troubles trying to update my hassio 0.85.1 to 0.89.2 and this is the log of the error:

"[Info] Start install HomeAssistant latest
Fatal Python error: initfsencoding: Unable to get the locale encoding
LookupError: no codec search functions registered: can’t find encoding
Current thread 0x76f2f4a4 (most recent call first):
[Error] Install HomeAssistant: "

Anyone could help? I am sorry for formatting errors or any other mistake ,but i am not used at this forum until now.

Luca