problem in installing plugin

[looser123172]

An error occurred while collecting items to be installed session context was:(profile=DefaultProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=). No repository found containing: osgi.bundle,com.sun.xml.bind,2.2.0.v201505121915

[sharadkaushik21]

Cannot complete the install because one or more required items could not be found. Software being installed: Thymeleaf Content Assist source code 2.1.2.201603041014 (org.thymeleaf.extras.eclipse.contentassist.feature.source.feature.group 2.1.2.201603041014) Missing requirement: Thymeleaf Content Assist 2.1.2.201603041014 (org.thymeleaf.extras.eclipse.contentassist.feature.feature.group 2.1.2.201603041014) requires 'org.eclipse.equinox.p2.iu; org.eclipse.wst.html.ui 1.0.602' but it could not be found Cannot satisfy dependency: From: Thymeleaf Content Assist source code 2.1.2.201603041014 (org.thymeleaf.extras.eclipse.contentassist.feature.source.feature.group 2.1.2.201603041014) To: org.eclipse.equinox.p2.iu; org.thymeleaf.extras.eclipse.contentassist.feature.feature.group [2.1.2.201603041014,2.1.2.201603041014]

[jagdish590]

I am getting "There is no categorize item" Attaching the screenshot Could any one please help me what I need to do to resolve this