How to install codeigniter and view at a temporary URL.

Hi guys, how are you? I would like to take a doubt with you. I'm new to codeigniter and I'm doing a testing environment to use codeigniter. I currently use the CWP (Control Web Panel) to organize my test environment. I create the hosting account normally and would like to use the temporary url that it creates, for example teste.ddns.net/~client1. When downloading the latest version of codeigniter I put the content of public in my client's /home/client1/public_html folder. The rest of the directories are located in the root folder of the client /home/client1/codeigniter. I checked the permissions and owners of the file and they are ok. But typing the url http://teste.ddns.net/~cliente1 gives the message 500 Internal Server Error. Is it possible to function CI4 in this temporary url? I appreciate the help.