My site is sometimes not accessible

Hello, I created my site a little more than 2 weeks ago with wordpress (org) and I hosted it with 000Webhost and, most of the time, everything works well: the site is accessible and I can keep improving it.
But it happens that it’s down and I can’t save anything when I’m writing an article. When this happens, I no longer have access to the administration of the site and it is no longer visible.
When the site is down, this page appears when you go to the site link (https://myfrenchlearning.000webhostapp.com/) : https://ibb.co/DrkPmRP
As you can see, the link changes and I arrive on a wordpress installation page.
So I don’t understand why this sometimes happens and it’s very annoying because it slows down the creation of articles on the site and sometimes prevents users from accessing them.
I hope someone will be able to help me with this sporadic problem (it happens a few times a day and can last from 2 minutes to several hours).
Have a good day :slight_smile: