Minimwatch on Ubuntu 17.10 fails at startup

[lozdown]

I upgraded to Ubuntu V17.10. Java is OpenJDK 9. Updated Minimwatch to V0.8.4.7 use Java 9.
Minimwatch will not start giving error 'unable to create tray icon'.

minimwatch.log

Code:

MinimWatch 0.8.4.7, Copyright (c) 2012-2017 Simon Nash. All rights reserved.
OpenJDK Runtime Environment (build 9-Ubuntu+0-9b181-4)
OpenJDK 64-Bit Server VM (build 9-Ubuntu+0-9b181-4, mixed mode)
Platform default charset is UTF-8
MinimWatch: unable to create tray icon
MinimWatch: unable to create tray icon
Selected media server: MinimWatch
MinimWatch failure: now stopped, use 'relaunch' or 'exit'
SIGHUP will be processed

minimwatch-out.log

Code:

MinimWatch 0.8.4.7, Copyright (c) 2012-2017 Simon Nash. All rights reserved.
Enter command (? for help):
>MinimWatch: unable to create tray icon
MinimWatch: unable to create tray icon
/usr/share/themes/Ambiance/gtk-2.0/apps/mate-panel.rc:30: error: invalid string constant "murrine-scrollbar", expected valid string constant
Selected media server: MinimWatch
>MinimWatch failure: now stopped, use 'relaunch' or 'exit'
>

What to do?