connection no longer available

Hello My Tor browser (‎downloaded 28 ‎october ‎2018) does not accept connections since today. Nothing changed in configurations. "The proxy server is refusing connections. Firefox is configured to use a proxy server that is refusing connections. Check the proxy settings to make sure that they are correct. Contact your network administrator to make sure the proxy server is working."

I tried to download the current version. Opening is blocked (lack of api-ms-win-crt-convert-l1-1-0.dll). Download this file and add in Sytem32, SysWOW64 and tor browser file (advice on internet) does not work. Opening is blocked : error 0xc0007b. Reinstall DirectX, Framework and C++ redistributable, SFC scan (advices on internet) don't change anything. Still error 0xc0007b.

My computer is an asus of october 2013, with windows 8, x64.

What should I do to be able to use again Tor browser ?

Thanks for your help

Trac:
Username: aldo3400001