Cannot install Spring STS and Microservices Plugins on Eclipse Neon.3 - spring

I am not able to install Spring STS and Microservices plug-ins to my Eclipse Neon.3. I get the following error -

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Spring Tool Suite (STS) not downloading Maven Dependencies automatically after starting Spring Starter Project in Mavericks

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Version: 3.6.1.RELEASE
Build Id: 201408250818
Platform: Eclipse Luna (4.4)
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