I recently had an error loading a Java project in Netbeans – whenever I selected it, I’d get this:
How to fix
After some Googling, the fix appears to be commenting out the <parent> tag from the project’s pom.xml file.
<!--<parent> <groupId>foo</groupId> <artifactId>bar</artifactId> <version>1.0.0</version> </parent>-->
File this under “I have no idea how, but it fixes the problem”.