OK"

Though part of the first line of the error message changes, I have started getting a repeated error message with some emails - usually business emails. They download and appear on the Thunderbird page but immediately the error message comes up as below: "An error occurred during a connection to 'xyz.abc'.com:443. Cannot communicate securely with peer: no common encryption algorithm(s) (Error code: ssl_error_no_cypher_overlap) OK" Sometimes I need to click on 'OK' several times before the email is accessible., or I can close the error message window with the cross in the corner. It occurs each time I open that email again, and if I need to reply to that email, the error message comes up so many times I can barely type 2 or 3 letters before I need to close the error message to continue. For business I have to 'reply' to emails alot to retain the chain of emails - please help ASAP.