The error is logged if there is no highlighting found the semantic token type. This, unfortunately, logs an error for a highlighting that is disabled in the preferences which is wrong:
eclipse.buildId=4.36.0.202506052058
java.version=21.0.7
java.vendor=Eclipse Adoptium
BootLoader constants: OS=macosx, ARCH=aarch64, WS=cocoa, NL=de_DE
Framework arguments: -product org.springframework.boot.ide.branding.sts4 -keyring /Users/martinlippert/.eclipse_keyring
Command-line arguments: -os macosx -ws cocoa -arch aarch64 -product org.springframework.boot.ide.branding.sts4 -keyring /Users/martinlippert/.eclipse_keyring
org.eclipse.jdt.ui
Error
Fri Jun 06 09:25:54 CEST 2025
Cannot find semantic highlighting for SemanticToken[ofset=1294, length=7, tokenType=CLASS]