- I saw the error.
- I Googled: “freepbx apache Warning: DocumentRoot [/invalid/folder/name] does not exist”
- Frist result: Freepbx web not working after recent module upgrade - General Help - FreePBX Community Forums
- Second Result: Zulu UC down, webserver misconfiguration? [SOLVED] - Commercial Products and Partners / PBXact - FreePBX Community Forums
The commonality is a certificate issue. Does this apply to you?