java.lang.NullPointerException: Failed to download map listing from: http://raw.githubusercontent.com/triplea-maps/Project/master/production_config/triplea_maps.yaml?raw=true

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Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

Solutions on the web

via GitHub by panther2
, 1 year ago
Failed to download map listing from: http://raw.githubusercontent.com/triplea-maps/Project/master/production_config/triplea_maps.yaml?raw=true
via Ecosystem JIRA by Federico Armas, 1 year ago
You have to be logged in to use OAuth authentication.
via Google Groups by sorin....@gmail.com (JIRA), 1 year ago
There is no credentials with admin access to manage hooks on GitHubRepositoryName[host=github.com,username=wkda,repository=classifieds-service]
via GitHub by gitnoor
, 2 years ago
Unable to find executable for: taskkill
java.lang.NullPointerException: Failed to download map listing from: http://raw.githubusercontent.com/triplea-maps/Project/master/production_config/triplea_maps.yaml?raw=true
at games.strategy.engine.framework.map.download.DownloadMapsWindow.showDownloadMapsWindow(DownloadMapsWindow.java:81)
at games.strategy.engine.framework.map.download.DownloadMapsWindow.showDownloadMapsWindow(DownloadMapsWindow.java:72)
at games.strategy.engine.framework.startup.ui.GameSelectorPanel.lambda$layoutComponents$166(GameSelectorPanel.java:180)
at games.strategy.ui.SwingComponents.lambda$newJButton$550(SwingComponents.java:165)
at games.strategy.ui.SwingAction$2.actionPerformed(SwingAction.java:53)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at org.pushingpixels.substance.internal.utils.RolloverButtonListener.mouseReleased(RolloverButtonListener.java:124)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(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 games.strategy.engine.framework.GameRunner$1.dispatchEvent(GameRunner.java:156)
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)

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