My current home, the landlord doesn’t have a cable and I’m separate from the house. I’ve been using a wifi router to pick up the signal and then I just connect my devices to that router. It works as an access point basically.
I’m using the GL.inet Flint and it’s been solid for several years. It runs openWRT. Just make sure the router has the ability to repeat. A lot of wifi routers are one way only.
Looks like it tries to mkdir a directory that it doesn’t have permission to.
Start checking what the perms are on the parent directory?