Hello - I just started having the exact same error after it was working - I believe this started with April 1dt. it is because 2018 is going obsolete by May 31st and these services will no longer be supported. I upgraded to Enterprise 2021 (or you can do 2019, 2020) and it is back to working fine and the connection pops up saying Im once again connected. You will need to upgrade as apparently some of the services are now obsolete.