You are the system administrator of your self-hosted Chevereto, you have to document yourself in how to handle the system. If you don't know how to do it you can ask how-to at Community Help, for which you will require to disclose what type of server are you using and proactively answer the questions about your system that others may ask you.
We also offer Extra Support if you need on-site assistance and want to save yourself all the hassle.