JOSM Unable to Download Map Data

[anonymous]

What steps will reproduce the problem?

1. Open JOSM
2. Click the "Download Map Data" button

What is the expected result?

A slippy map window opens, allowing the user to select an area of the map to download.

What happens instead?

JOSM reports an error

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2022-01-02 21:24:43 +0100 (Sun, 02 Jan 2022)
Revision:18360
Build-Date:2022-01-02 20:26:19
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (18360 en) Linux Ubuntu 21.04
Memory Usage: 551 MB / 3984 MB (285 MB allocated, but free)
Java version: 11.0.13+8-Ubuntu-0ubuntu1.21.04, Ubuntu, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 1680×1050 (scaling 1.00×1.00)
Maximum Screen Size: 1680×1050
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_US.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: KDE
Java package: openjdk-11-jre:amd64-11.0.13+8-0ubuntu1~21.04
Java ATK Wrapper package: libatk-wrapper-java:all-0.38.0-2ubuntu2
libcommons-logging-java: libcommons-logging-java:all-1.2-2
fonts-noto: fonts-noto:-

Plugins:
+ ImproveOsm (215)
+ KartaView (387)
+ Mapillary (2.0.0-beta.2)
+ OpeningHoursEditor (35893)
+ SimplifyArea (35893)
+ apache-commons (35893)
+ apache-http (35893)
+ buildings_tools (35908)
+ ejml (35893)
+ geotools (35906)
+ gson (35893)
+ intersection (0.0.7)
+ jaxb (35893)
+ jna (35893)
+ jts (35893)
+ mapdust (35893)
+ mapwithai
+ opendata (35910)
+ pt_assistant (1ff2e15)
+ tageditor (35893)
+ turnlanes-tagging (v0.0.5)
+ utilsplugin2 (35893)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/MapWithAI&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Bench&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/BesideTheRoad_Speed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/SidewalksAndFootways&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
- https://raw.githubusercontent.com/OpenSidewalks/OpenSidewalks-Schema/master/open_sidewalks.mapcss

Last errors/warnings:
- 00012.053 E: Failed to locate image 'bus.png'
- 00012.165 E: Failed to locate image 'MapWithAI'
- 00013.244 E: org.openstreetmap.josm.plugins.PluginException: An error occurred in plugin mapwithai. Cause: java.lang.reflect.InvocationTargetException. Cause: java.lang.NullPointerException
- 00013.283 W: Disable plugin - Could not load plugin 'mapwithai'. Delete from preferences?
- 00016.060 E: Handled by bug report queue: java.lang.NullPointerException



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (19) of main
java.lang.NullPointerException
	at java.base/java.util.regex.Matcher.appendExpandedReplacement(Matcher.java:1015)
	at java.base/java.util.regex.Matcher.appendReplacement(Matcher.java:908)
	at org.openstreetmap.gui.jmapviewer.tilesources.TemplatedTMSTileSource.lambda$handleTemplate$1(TemplatedTMSTileSource.java:109)
	at org.openstreetmap.gui.jmapviewer.tilesources.TemplatedTMSTileSource.replacePattern(TemplatedTMSTileSource.java:86)
	at org.openstreetmap.gui.jmapviewer.tilesources.TemplatedTMSTileSource.handleTemplate(TemplatedTMSTileSource.java:107)
	at org.openstreetmap.gui.jmapviewer.tilesources.TemplatedTMSTileSource.<init>(TemplatedTMSTileSource.java:78)
	at org.openstreetmap.josm.data.imagery.JosmTemplatedTMSTileSource.<init>(JosmTemplatedTMSTileSource.java:20)
	at org.openstreetmap.josm.gui.layer.TMSLayer.getTileSourceStatic(TMSLayer.java:120)
	at org.openstreetmap.josm.gui.layer.TMSLayer.getTileSourceStatic(TMSLayer.java:101)
	at org.openstreetmap.josm.gui.bbox.JosmMapViewer.imageryInfosToTileSources(JosmMapViewer.java:73)
	at org.openstreetmap.josm.gui.bbox.JosmMapViewer$AbstractImageryInfoBasedTileSourceProvider.getTileSources(JosmMapViewer.java:65)
	at org.openstreetmap.josm.gui.bbox.SlippyMapBBoxChooser.lambda$getAllTileSources$2(SlippyMapBBoxChooser.java:151)
	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.openstreetmap.josm.gui.bbox.SlippyMapBBoxChooser.getAllTileSources(SlippyMapBBoxChooser.java:152)
	at org.openstreetmap.josm.gui.bbox.SlippyMapBBoxChooser.<init>(SlippyMapBBoxChooser.java:117)
	at org.openstreetmap.josm.gui.download.SlippyMapChooser.<init>(SlippyMapChooser.java:35)
	at org.openstreetmap.josm.gui.download.DownloadDialog.buildMainPanel(DownloadDialog.java:148)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:263)
	at org.openstreetmap.josm.gui.download.DownloadDialog.<init>(DownloadDialog.java:251)
	at org.openstreetmap.josm.gui.download.DownloadDialog.getInstance(DownloadDialog.java:92)
	at org.openstreetmap.josm.actions.DownloadAction.actionPerformed(DownloadAction.java:40)
	at org.openstreetmap.josm.gui.download.DownloadDialog.autostartIfNeeded(DownloadDialog.java:500)
	at org.openstreetmap.josm.gui.MainApplication$GuiFinalizationWorker.run(MainApplication.java:1374)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[taylor.smock]

Closed as duplicate of #21844.