Support

It is better if you describe your problem instead of just sending a screenshot. All I see in the screenshot is Kickstart showing you an error message “Could not open [REDACTED]/public_html/installation/extrainfo.json for writing.”

This is a permissions issue, or your host running out of disk space (or disk space quota for your account).

Is the installation directory created at all? Does it have any other files in it? If either answer is "no" it is a permissions issue. Ask your host what's going on. You can alternatively follow Kickstart's documentation instructions to create a kicktemp directory with 0777 permissions, and use the Hybrid file write mode having set up your FTP information in its interface as a workaround. I don't recommend this, though. It will cause other problems down the road, such as being unable to update Joomla and its extensions.

If there are some files under installation, the problem is that your server ran out of disk space, or you exceeded the disk quota (in terms of space or number of files) imposed by your host. Again, you need to contact your host. This is not something you or I can do anything about. We don't have control over that server.