Dear Maintainer, This is related to: https://github.com/Syncplay/syncplay/issues/774 Upstream has a merged fix: https://github.com/Syncplay/syncplay/pull/775 The fix is in the latest release `1.7.6`: https://github.com/Syncplay/syncplay/releases/tag/v1.7.6 Without this fix, TLS can't be used and Syncplay is mostly unusable, unless connecting to a trusted LAN server, which is almost never the case. The builtin and default Syncplay server addresses use TLS, so the default installation will not work.