Error Report

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Listings: 
Error Code: 
4
Error Message: 
Operation details
Installable Units Reported: 
org.thymeleaf.extras.eclipse.contentassist.feature.feature.group,2.1.2.201603041014
Detailed Message: 
Cannot complete the install because one or more required items could not be found. Software being installed: Thymeleaf Content Assist 2.1.2.201603041014 (org.thymeleaf.extras.eclipse.contentassist.feature.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