Project disappeared from Netbeans project pane and failing to open when attempted

### Apache NetBeans version

Apache NetBeans 18

### What happened

Since tomcat server failed to restart throwing error that port 8080 is already in used, I tried killing the process id running on port 8080, using netstat command. Below are the problems occurred after that.
1. Netbeans got closed
2. When I reopened the netbeans, that particular project on which I was working, was not in the Projects pane of Netbeans.
3. When I tried opening the project by selecting the project folder from netbeans File -> open project option, the project didn't open and throwing error as - web pages folder not found. check the project properties. I check the project properties in the nbproject folder and I corrected the required properties - i.e updated the web directory value etc. and then I tried opening the project again, This time it didn't threw that web pages folder not found error, but it threw some other error as failed to execute /setup.
4. I tried all the ways people have suggested on stackoverflow. Nothing worked for me, except creating a new project and then copying the source code and dependencies from my existing project directory.

### How to reproduce

Not sure how to reproduce, But in my case the project got disappeared when I killed the tomcat process id and the netbeans got closed.
And I faced this problem 2 times.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

windows 10

### JDK

11

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

_No response_

### Are you willing to submit a pull request?

No

Start by reproducing the reported sequence on Windows 10 with NetBeans 18 and JDK 11: stop the process using port 8080, reopen NetBeans, and try opening the affected project. Inspect the project properties in the nbproject folder and the reported setup failure; done means the project remains available in the Projects pane and opens successfully after the server process is stopped.

Written by the indexing model from the issue text.