Avast free antivirus update error

Help-

I am having trouble updating my antivirus on my 8.0.1.15.6 as says-
"Last encountered error. Not enough storage is available to process this command
Total time 8s

Hi.

Welcome.

Information provided is not enough to help.

Are you talking about avast version 8.0.1.15.6?

Support for older versions ended May 31st, 2015: https://blog.avast.com/2015/05/06/support-for-older-avast-windows-consumer-version-will-end/