Cannot access TMs on WorldServer after updating to Trados 2019

Dear Community,

after updating to Trados 2019 I cannot access the TMs on WorldServer anmyore.

The credentials have not changed but when I try to login I get the error message: A connection to server XXXXX could not be established for the following reason: Cannot establish connection to the remote server. As mentioned, this is the problem since I updated to Trados 2019, no credentials have been changed. Can you help?