Error in Eclipse

[goodale]

I get this error every time I start Eclipse. I've re-installed Thymeleaf extras and updated to the latest version (Thymeleaf Content Assist 3.0.1.202109120458)

Errors occurred during the build.
Error instantiating builder 'org.thymeleaf.extras.eclipse.core.ThymeleafBuilder'.
Plug-in org.thymeleaf.extras.eclipse.core was unable to load class org.thymeleaf.extras.eclipse.builder.ThymeleafBuilder.
An error occurred while automatically activating bundle org.thymeleaf.extras.eclipse.core (787).
Plug-in org.thymeleaf.extras.eclipse.core was unable to load class org.thymeleaf.extras.eclipse.builder.ThymeleafBuilder.
An error occurred while automatically activating bundle org.thymeleaf.extras.eclipse.core (787).
Error instantiating builder 'org.thymeleaf.extras.eclipse.core.ThymeleafBuilder'.
Plug-in org.thymeleaf.extras.eclipse.core was unable to load class org.thymeleaf.extras.eclipse.builder.ThymeleafBuilder.
An error occurred while automatically activating bundle org.thymeleaf.extras.eclipse.core (787).
Plug-in org.thymeleaf.extras.eclipse.core was unable to load class org.thymeleaf.extras.eclipse.builder.ThymeleafBuilder.
An error occurred while automatically activating bundle org.thymeleaf.extras.eclipse.core (787).