I use two Chrome based browsers, Torch and UC Browser, recently neither would download any extensions; I got the message 'failed - network error'. I uninstalled with thorough uninstallers and reinstall, just the same.

I asked both customer services in vain. Then I installed genuine Chrome (Canary) so that I could turn to Chrome's help-desk or forum. Same failure with the extensions as well as with getting help.

How to fix it?
Thanks a lot.