java eclipse springboot white label error help

[outer snow]

I was hoping that I could get some help with spring boot in eclipse. I am very new to it and trying to figure it out. I am not sure what I am doing wrong. Can someone please help me figure it out? When I try and run spring boot application from eclipse I get the error

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Fri Jun 09 22:06:07 CDT 2023
There was an unexpected error (type=Not Found, status=404).
No message available

I saw an answer on a youtube video that said to move the java file to the controller folder but it looks like I don't have one of them.

java code
https://pastebin.com/tfWcqSeP

html code
https://pastebin.com/rcq3QrRE

package explorer
https://imgur.com/a/F77u9zz

[plush reef]

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[signal tendon]

@outer snow Hi, how are you accessing the web page? If you put "localhost:8080/number-converter.html" does not work?

If you are just doing "localhost:8080" you will get an error because you don't have an index.html defined.

[outer snow]

I did try to do that but I am getting the white label error.

[signal tendon]

In the Eclipse console, what error do you get?

[coarse raptor]

Which site are you requesting?

I think /covertNumber and /number-converter.html should work

other sites shouldn't

as far as I have seen