Cannt upgrade to 2.4

I’m following the instructions but when I try to download the framework I got this message:

Downloading framework
Untarring…Error(s) downloading framework:
Could not untar /var/www/html/admin/modules/_cache/framework- to /var/www/html/admin/modules/_cache

What should I do? Or should I try to upgrade to 2.5

Please Let me know

Thanks for your help

Look in the directory /var/www/html/admin/modules/_cache
You should see a lot of files like this:

Verify that all files are listed as asterisk asterisk. If they are not, type this in that directory:
chown asterisk.asterisk *

Then try again.