Unexpected exception on loading plugin

[doublah]

What steps will reproduce the problem?

1. Load Streetside plugin from 'Imagery' tab menu.
2. Pop-up says "An unexpected exception occurred that may have come from the 'MicrosoftStreetside' plug-in. According to the information within the plug-in, the author is Microsoft. Try updating to the newest version of this plug-in before reporting a bug."
3. Click update plugin.
4. Get a warning pop-up saying "JOSM could not find information about the following plug-ins:" and lists all? plugins.
5. Press okay and get sent to the bug report screen.
6. If I press 'Ignore this error.' button, we loop back and the pop-up in Step 2 comes back.

What is the expected result?

Plugin would load or would fail to load without causing other plugins to not load.

What happens instead?

Plugin fails to load, and this somehow causes other plugins to fail.

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: 2020-10-03 13:42:38 +0200 (Sat, 03 Oct 2020)
Build-Date:2020-10-04 01:30:47
Revision:17084
Relative:URL: ^/trunk

Identification: JOSM/1.5 (17084 en_GB) Windows 10 64-Bit
OS Build number: Windows 10 Home 1909 (18363)
Memory Usage: 889 MB / 1820 MB (444 MB allocated, but free)
Java version: 1.8.0_261-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920x1080 (scaling 1.0x1.0), \Display1 1920x1080 (scaling 1.0x1.0)
Maximum Screen Size: 1920x1080
Best cursor sizes: 16x16 -> 32x32, 32x32 -> 32x32
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-22b8f076, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=NULL,2048m, -Djnlpx.splashport=52805, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djnlpx.jvm=<java.home>\bin\javaw.exe]
Dataset consistency test: No problems found

Plugins:
+ AddrInterpolation (35405)
+ DirectDownload (35552)
+ DirectUpload (35550)
+ EasyPresets (1595741614)
+ FastDraw (35499)
+ HouseNumberTaggingTool (35508)
+ Mapillary (1.5.25)
+ MicrosoftStreetside (35248)
+ OpeningHoursEditor (35414)
+ PicLayer (35405)
+ apache-commons (35524)
+ apache-http (35092)
+ buildings_tools (35574)
+ continuosDownload (91)
+ damn (0.1.2)
+ importvec (35499)
+ indoorhelper (20bf8a3-dirty)
+ javafx-windows (35458)
+ jna (35092)
+ measurement (35405)
+ osmai (1.0)
+ poly (35248)
+ reverter (35556)
+ splinex (35454)
+ terracer (35560)
+ utilsplugin2 (35487)
+ wikipedia (1.1.4)

Tagging presets:
+ https://raw.githubusercontent.com/osmlab/name-suggestion-index/master/dist/name-suggestions.presets.xml
+ https://raw.githubusercontent.com/yopaseopor/traffic_signs_preset_JOSM/master/GB.zip
+ https://josm.openstreetmap.de/josmfile?page=Presets/WifiHotspots&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/PublicTransportOneClick&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/Post_box_UK&zip=1

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/iD&zip=1
- https://raw.githubusercontent.com/yopaseopor/indoormap/master/indoormap-style.mapcss
- https://github.com/MissingMaps/josm_styles/archive/master.zip
- https://www.openrailwaymap.org/styles/josm-additional.zip
- https://www.openrailwaymap.org/styles/electrified.zip
- https://www.openrailwaymap.org/styles/standard.zip
- https://www.openrailwaymap.org/styles/maxspeed.zip
- https://www.openrailwaymap.org/styles/signals.zip
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransportV2&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://github.com/osmlab/appledata/archive/josm_paint_inline_validation.zip
- <josm.pref>\styles\sit.mapcss

Validator rules:
+ https://josm.openstreetmap.de/josmfile?page=Rules/KeepRight&zip=1

Last errors/warnings:
- 00014.224 E: Failed to locate image 'traffic_signs/A/A_V4a.png'
- 00014.224 W:  No overtaking: Could not get presets icon traffic_signs/A/A_V4a.png
- 00024.298 E: Failed to locate image 'presets/misc/embankment-pattern-centered.png'
- 00024.302 E: Failed to locate image 'presets/misc/embankment-pattern-centered.png'
- 00024.304 E: Failed to locate image 'presets/misc/embankment-pattern.png'
- 00024.719 E: Failed to locate image 'presets/misc/embankment-pattern.png'
- 00028.671 E: Failed to locate image 'presets/misc/embankment-pattern-centered.png'
- 00040.689 E: Handled by bug report queue: java.lang.NoClassDefFoundError: org/apache/commons/jcs/access/behavior/ICacheAccess. Cause: java.lang.ClassNotFoundException: org.apache.commons.jcs.access.behavior.ICacheAccess
- 00040.753 E: Handled by bug report queue: java.lang.NoClassDefFoundError: org/apache/commons/jcs/access/behavior/ICacheAccess. Cause: java.lang.ClassNotFoundException: org.apache.commons.jcs.access.behavior.ICacheAccess
- 00053.127 W: Warning - <html>JOSM could not find information about the following plug-ins:<ul><li>apache-commons</li><li>HouseNumberTaggingTool</li><li>javafx-windows</li><li>measurement</li><li>continuosDownload</li><li>utilsplugin2</li><li>EasyPresets</li><li>AddrInterpolation</li><li>terracer</li><li>wikipedia</li><li>jna</li><li>importvec</li><li>MicrosoftStreetside</li><li>PicLayer</li><li>indoorhelper</li><li>osmai</li><li>Mapillary</li><li>splinex</li><li>DirectDownload</li><li>DirectUpload</li><li>reverter</li><li>FastDraw</li><li>damn</li><li>OpeningHoursEditor</li><li>poly</li><li>buildings_tools</li><li>apache-http</li></ul>The plug-ins are not going to be loaded.</html>


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-2 (60) of javawsApplicationThreadGroup
java.lang.NoClassDefFoundError: org/apache/commons/jcs/access/behavior/ICacheAccess
	at org.openstreetmap.josm.plugins.streetside.gui.StreetsideMainDialog.updateImage(StreetsideMainDialog.java:229)
	at org.openstreetmap.josm.plugins.streetside.mode.SelectMode.mouseMoved(SelectMode.java:177)
	at java.awt.AWTEventMulticaster.mouseMoved(Unknown Source)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at javax.swing.JComponent.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.jcs.access.behavior.ICacheAccess
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at org.openstreetmap.josm.plugins.PluginClassLoader.loadClass(PluginClassLoader.java:73)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 34 more

[simon04]

Closed as duplicate of #19208.
See ticket:19208#comment:20