OctoDash keeps scrolling through 404 errors on the screen

[gruenerpanzer]

OctoDash keeps scrolling through 404 errors on the screen

Describe the bug
Error 404 for everything in octodash

To Reproduce
Steps to reproduce the behavior:
New Installation of Octoprint image 0.18.0

I have deleted the config.jason several times and recreated it to test it with other parameters as follows:
"url": "http://localhost:80/api/",
"url": "http://127.0.0.1:80/api/",
"url": "http://localhost:5000/api/",
"url": "http://127.0.0.1:5000/api/",
A rebot was carried out after each change

Expected behavior
Error does not appear

Screenshots

Display error:

config-json:

General Information:

• Hardware:
  Raspberry Pi 3 Model B Rev 1

• OS Info
  PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
  NAME="Raspbian GNU/Linux"
  VERSION_ID="10"
  VERSION="10 (buster)"
  VERSION_CODENAME=buster
  ID=raspbian
  ID_LIKE=debian
  HOME_URL="http://www.raspbian.org/"
  SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
  BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"

• OctoDash Version [e.g. v1.0.0]
  v2.1.2

• OctoPrint Version [e.g. v1.0.0]
  OctoPrint version : 1.5.3
  OctoPi version : 0.18.0
  Additional context
  Add any other context about the problem here.