JOSM throws error on startup, continues to show splash screen but does not proceed to edit window

[wolfgang@…]

What steps will reproduce the problem?

1. start josm from command line

What is the expected result?

JOSM starting, showing splash screen during init phase, then proceed to edit window

What happens instead?

JOSM starting, showing splash screen during init phase, opens error window while splash screen continues to be shown, never proceeds to showing edit window. Message from error window shown below.

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-01-02 22:34:59 +0100 (Thu, 02 Jan 2020)
Build-Date:2020-01-02 21:52:31
Revision:15628
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15628 de) FreeBSD
Memory Usage: 316 MB / 912 MB (177 MB allocated, but free)
Java version: 1.8.0_242-b07, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1200
Maximum Screen Size: 1920x1200

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/TigerReviewedNo&zip=1

Last errors/warnings:
- E: Handled by bug report queue: java.lang.UnsatisfiedLinkError: sun.nio.fs.LinuxWatchService.inotifyInit()I


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: main (1)
java.lang.UnsatisfiedLinkError: sun.nio.fs.LinuxWatchService.inotifyInit()I
	at sun.nio.fs.LinuxWatchService.inotifyInit(Native Method)
	at sun.nio.fs.LinuxWatchService.<init>(LinuxWatchService.java:59)
	at sun.nio.fs.BsdFileSystem.newWatchService(BsdFileSystem.java:51)
	at org.openstreetmap.josm.io.FileWatcher.<init>(FileWatcher.java:55)
	at org.openstreetmap.josm.io.FileWatcher$InstanceHolder.<clinit>(FileWatcher.java:38)
	at org.openstreetmap.josm.io.FileWatcher.getDefaultInstance(FileWatcher.java:47)
	at org.openstreetmap.josm.gui.MainInitialization.beforeInitializationTasks(MainInitialization.java:72)
	at org.openstreetmap.josm.spi.lifecycle.Lifecycle.initialize(Lifecycle.java:71)
	at org.openstreetmap.josm.gui.MainApplication.mainJOSM(MainApplication.java:903)
	at org.openstreetmap.josm.gui.MainApplication$3.processArguments(MainApplication.java:276)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:703)

[Don-vip]

Closed as duplicate of #18583.