to test it i typed
megasync --version
the output is
megasync: symbol lookup error: megasync: undefined symbol: _ZN10QSslSocket11supportsSslEv
System: Linux mint XFCE 18.3
Did you download the correct package for your distribution from https://mega.nz/sync? Also, ensure you have your system up-to-date. I've just tested in a brand new XFCE 18.3 and there's no such issue.
to test it i typed
megasync --version
the output ismegasync: symbol lookup error: megasync: undefined symbol: _ZN10QSslSocket11supportsSslEv
System: Linux mint XFCE 18.3