but you need to change this cmd-line
unzip bootstrap.zip
to
unzip z_bootstrap.zip
all fine again
blockchain synchronized again and the masternode/s are running

why after this command
cd ~/.bitcore
rm -r blocks/ chainstate/ indexes/ sporks/ *.dat *.log .lock masternode.conf
l got this
error: Could not connect to the server 127.0.0.1:9469
Make sure the bitcored server is running and that you are connecting to the correct RPC port.
Bitcore server was worked before,
but not sync,after download bootstrap not work.
Vultr,Ubuntu 18.04
QT wallet not synced