Question: python libraries that I want to install using pip by ignoring version errors.

![python libraries that I want to install using pip by ignoring version errors.](https://i.stack.imgur.com/62DT6.png)

Answer: 
1. Check that your gwt.xml really inherits "com.google.gwt.user.User"
2. Check java sdk. Some gwt versions work only with java 1.8
3. If you use Idea, there was a bug, which also causes this error: <https://youtrack.jetbrains.com/issue/IDEA-218731?_ga=2.120118728.1133270638.1599566675-1712334692.1566210515>
Use 1.8.0 JRE to compile the GWT application.
You can setup this in eclipse as shown below.

[enter image description here](https://i.stack.imgur.com/MJDPh.png)

Then try to compile the application you will get the following output in console.

Compiling module com.somshine.miniproject.MiniProject
Compiling 5 permutations
Compiling permutation 0...
Compiling permutation 1...
Compiling permutation 2...
Compiling permutation 3...
Compiling permutation 4...
Compile of permutations succeeded
Compilation succeeded -- 21.193s
Linking into D:\Java\gwtProject\miniProject\war\miniproject
Link succeeded
Linking succeeded -- 0.426s