javax.net.ssl.SSLException: Fatal alert received protocol_version #956
Description
javax.net.ssl.SSLException: Fatal alert received protocol_version
I cannot connect to server... I found connecting on Android 7.1.1 or earlier fails since January 2021, while the connection works on later versions. And It's because devices of Android operating systems prior to 7.1.1, don’t trust ISRG Root X1.
read this:
https://letsencrypt.org/2020/12/21/extending-android-compatibility.html