file .project use Sublim Text to see it, is not visible with VScode and in Eclipse
Sometime a part of this code is lost and eclipse don't reconize it. So look if the org.eclipse.jdt.core.javabuilder
and is présent org.eclipse.jdt.core.javanature
The last original 2021 / 3 /17 is like that
Rope org.eclipse.jdt.core.javabuilder org.eclipse.jdt.core.javanature 1612020793752 30 org.eclipse.core.resources.regexFilterMatcher node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__