eclipse in tomcat add or remove web project mistakes, showed no resources can be added or removed

Error Screenshot

 

 

 Prior has been able to normal use, this inexplicable error occurs today

Solution

https://blog.csdn.net/u012956987/article/details/79134474

 

Right-click the project, set in the properties

 

 

 

 

 problem solved.

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Origin www.cnblogs.com/YorkZhangYang/p/12331221.html