LO 5.2 snap example won't install on Ubuntu 16.04.1 LiveUSB

snapd insfalled
snap lists LO 5.2 & ubuntu core
failure message says
[quote
app cannot be started
[context='shared"] caught unexpected
…exception…,
[/quote]
Similar failures on Peppermint 7, Lubuntu 16.10 alpha & Xubunt 16.04.1 LiveUSBs

any help welcome