I encountered a very annoying problem today. All the projects in the eclipse workspace reported errors when I opened them.
There was no response when executing maven commands, and there was no response on the console. output.
Click maven update project and it prompts that the chosen operation is not currently available (The selected operation is not currently available)
It took several hours to solve it.
Option 1:
First delete all projects (be careful not to delete the source code)
Restart eclipse
Re-import Project
So maven can resume use
Option 2:
Replace \.metadata\.plugins\org.eclipse in the workspace. e4.workbench\workbench.xmi (used before the error was reported)
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