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==== Startup Error: MessageNotUnderstood: receiver of "unsubscribe:" is nil
UndefinedObject(Object)>>doesNotUnderstand: #unsubscribe:
[ :c | c repository unsubscribe: c ] in PhLTitledTreeModel class>>unsubscribeAllRepositories in Block: [ :c | c repository unsubscribe: c ]
PhLTitledTreeModel class(Behavior)>>allInstancesDo:
PhLTitledTreeModel class>>unsubscribeAllRepositories
PharoLauncher class>>openFull
PhLDeploymentScript class>>openLauncher
PhLDeploymentScript class>>closeWindowsAndOpenLauncher
PhLDeploymentScript class>>launcherStartUp
[ :c | c launcherStartUp ] in PhLStartupManager class>>startUp in Block: [ :c | c launcherStartUp ]
SortedCollection(OrderedCollection)>>do:
PhLStartupManager class>>startUp
PhLStartupManager class(Behavior)>>startUp:
[ class perform: startUpOrShutDown with: argument ] in [ :name |
| class |
class := self at: name ifAbsent: [ nil ].
class
ifNil: [ removals add: name ]
ifNotNil: [ self logStartUpErrorDuring: [ class perform: startUpOrShutDown with: argument ] into: errors tryDebugger: false ] ] in SmalltalkImage>>send:toClassesNamedIn:with: in Block: [ class perform: startUpOrShutDown with: argument ...etc...
BlockClosure>>on:do:
SmalltalkImage>>logStartUpErrorDuring:into:tryDebugger:
[ :name |
| class |
class := self at: name ifAbsent: [ nil ].
class
ifNil: [ removals add: name ]
ifNotNil: [ self logStartUpErrorDuring: [ class perform: startUpOrShutDown with: argument ] into: errors tryDebugger: false ] ] in SmalltalkImage>>send:toClassesNamedIn:with: in Block: [ :name | ...
OrderedCollection>>do:
SmalltalkImage>>send:toClassesNamedIn:with:
SmalltalkImage>>processStartUpList:
[
startupErrors addAll: (self processStartUpList: isNewImage).
isNewImage
ifTrue: [ self recordStartupStamp ] ] in SmalltalkImage>>startupImage:snapshotWorked: in Block: [ ...
BlockClosure>>ensure:
NonInteractiveUIManager(UIManager)>>boot:during:
SmalltalkImage>>startupImage:snapshotWorked:
SmalltalkImage>>snapshot:andQuit:
UndefinedObject>>DoIt
OpalCompiler>>evaluate
OpalCompiler(AbstractCompiler)>>evaluate:
SmalltalkImage>>evaluate:
[
result := Smalltalk evaluate: aStream.
self hasSessionChanged
ifFalse: [
self stdout
print: result;
lf ] ] in EvaluateCommandLineHandler>>evaluate: in Block: [ ...
BlockClosure>>on:do:
Got startup errors:
MessageNotUnderstood: receiver of "unsubscribe:" is nil
Got startup errors:
PrimitiveFailed: primitive #createDirectory: in UnixStore failed

fixed

I just check, I am getting a 404 not found error when trying to install pharo-launcher

I get this error when I try to install pharo-lucher after installing pharo-vm-lates

==> ERROR: Failure while downloading PharoLauncher-user-stable-2015.08.08.zip
Aborting...