Cannot access the servlet with URl after group id changed in a multi module project

[fleet lark]

Helper please have a look, thanks.

[valid sandal]

So I got the project (it's a multi module app with ejb, core, ear, web) from my lecturer, His project is working fine. what I did was
I changed the groupId from "com.jiat" to "com.rag"

The project works fine but when I request to the servlet it shows 404. I barely have an idea what to search for

Let me put the project of mine and lecturer's

my project rar files are deleted for security reasons

[valid sandal]

This is the lecturer's

This is mine all I did was changed the artifact id

Both are the same project's only with group id change

if I request to the "calculate-tax" it will show hey with other tasks

Cannot access the servlet with URl after group id changed in a multi module project

[valid sandal]

This is the github repo

https://github.com/ragujan/get_help_for_a_multi_module_maven_project

[valid sandal]

Solved it by doing

changing the web module context root name

Then gave clean compile package to the ear module
Then gave clean compile package to the whole app