Eclipse Photon - Eclipse Marketplace not launching

Question

I just installed Eclipse Photon. I migraded one project from Oxygen to it - everything is working fine.

The problem I noticed is that I cannot open the Eclipse Marke

Answer 1

I managed to find the problem and fix it. I went to: Help -> About Eclipse IDE -> clicked on "Installation Details" -> tab "Configuration" -> Clicked on "View Error Log"

The default browser opened and there I noticed the following stack trace:

!ENTRY org.eclipse.ui 4 0 2018-06-28 10:38:21.036
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.e4.core.di.InjectionException: java.lang.IllegalArgumentException: Illegal character in path at index 16: file:/C:/Eclipse Photon/eclipse/configuration/
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)

It was the space character in the folder named by me: "Eclipse Photon". I renamed it to "EclipsePhoton" and the marketplace opened successfully.

Short answer: Make sure you do not have any spaces in the Eclipse installation file path.