Cannot upgrade screenconnect

When I try to upgrade 19.4.25759.7247 to 19.6.26659.7340 on a CentOS 7 server , screenconnect web  interface fails to start  with this error in the log :

Event (2020/02/12 23:10:10.445 +02:00, ScreenConnect Web Server, Information): Starting service...
mono_w32socket_convert_error: no translation into winsock error for (126) "Required key not available"
Aborting...

Tryied removing all extensions , restarting the server , same error