Skype Problems now - Anyone Else?

[Greenside]

I use skype for Windows desktop (on a wired network connection) frequently for calls to landlines, mostly in the UK, and never had an issue until yesterday when all attempts to call a couple of my regular UK numbers produce an error message "Your connection is too weak. Please try again later".  Other numbers seem OK.  I've done all the suggested fixes (re-installing, different Hardware and ISP, wi-fi, ethernet, rebooted everything except the cat....etc) so I'm thinking it must be Skype.  My ISP is AIS and DTAC mobile data on my phone.  All give the same error.  Anyone else having similar issues?   

[rankric]

Did you change location on vpn. I do this and all works again.