In order to provide an answer, you’ll need to provide more information about what is wrong and how you got to where you are. What you have shared so far doesn’t really tell us anything. For example, think about stating:
- If you installed Magento yourself, which method of installation did you use?
- What were you doing when it stopped working?
- Did it ever work?
- Did you setup your own server?
- Were you following any instructions at the time?
- What version of Magento 2 are you using?
- and anything that will help narrow down the issue…
Please, refer to the following: Guidelines when asking for technical help
Until we know more, we wouldn’t want to speculate and lead you down the wrong path.