I just installed Maven for a project in Eclipse.
Now Maven is complaining that the libraries are missing for it:

How do I fix this problem?
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Look in your .m2 directory (use the paths which you see in the dialog above) and check whether the files are there or whether they are really missing.
If they are missing, run “mvn install” (see the “Run as…” menu) to download them.
If they exist, you’ve hit a bug. Try to “update dependencies” in the Maven menu.
If that doesn’t help, try the latest version of m2e which you can find here: https://repository.sonatype.org/content/repositories/forge-sites/m2e/1.0.100/N/LATEST/