HTML Templates not working

[lightning-software]

I have created a simple template that works fine in a browser. When trying to add it, it fails with the following:
[info] Received message from 127.0.0.1: CG 1-20 ADD 1 "THIRDS-TEST" 1 ""\r\n
[error] Turn on log level debug for stacktrace.
[info] Sent message to 127.0.0.1:404 CG ADD FAILED\r\n

I have added an html section to my config file, but connecting to localhost at the port specified fails. Is CEF not installed, or something? I think I installed this from a repo...

Here is more of the log:
[2021-03-23 14:14:35.015] [info] Starting CasparCG Video and Graphics Playout Server 2.2.0 8bc4132 Stable
[2021-03-23 14:14:35.016] [info] Initialized ffmpeg module.
[2021-03-23 14:14:35.016] [info] Initialized oal module.
[2021-03-23 14:14:35.016] [info] Initialized decklink module.
[2021-03-23 14:14:35.016] [info] Initialized screen module.
[2021-03-23 14:14:35.016] [info] Initialized image module.
[2021-03-23 14:14:35.016] [info] "/etc/casparcg/casparcg.config":
[2021-03-23 14:14:35.016] [info] -----------------------------------------
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] /etc/casparcg/media/
[2021-03-23 14:14:35.016] [info] /etc/casparcg/log/
[2021-03-23 14:14:35.016] [info] /etc/casparcg/data/
[2021-03-23 14:14:35.016] [info] /etc/casparcg/template/
[2021-03-23 14:14:35.016] [info] /etc/casparcg/font/
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] CameraSecret
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] 1080p3000
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] udp://127.0.0.1:10000/stream.ts
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] 5250
[2021-03-23 14:14:35.016] [info] AMCP
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] localhost
[2021-03-23 14:14:35.016] [info] 8000
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] info
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] 8888
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info]
[2021-03-23 14:14:35.016] [info] -----------------------------------------
[2021-03-23 14:14:35.096] [info] Initializing OpenGL Device.
[2021-03-23 14:14:35.098] [info] Initialized OpenGL 4.5 (Core Profile) Mesa 18.3.6 Intel Open Source Technology Center
[2021-03-23 14:14:35.125] [info] Initialized OpenGL Accelerated GPU Image Mixer for channel 1
[2021-03-23 14:14:35.126] [info] video_channel[1|1080p3000] Successfully Initialized.
[2021-03-23 14:14:35.126] [info] ffmpeg[udp://127.0.0.1:10000/stream.ts] Initialized.
[2021-03-23 14:14:35.126] [info] Initialized channels.
[2021-03-23 14:14:35.127] [info] Initialized controllers.
[2021-03-23 14:14:35.127] [info] Initialized osc.
[2021-03-23 14:14:35.350] [info] async_event_server[:5250] Accepted connection from 127.0.0.1 (1 connections).
[2021-03-23 14:14:35.351] [info] Received message from 127.0.0.1: VERSION SERVER\r\n
[2021-03-23 14:14:35.351] [info] Sent message to 127.0.0.1:201 VERSION OK\r\n2.2.0 8bc4132 Stable\r\n
[2021-03-23 14:14:35.352] [info] Received message from 127.0.0.1: INFO\r\n
[2021-03-23 14:14:35.352] [info] Sent message to 127.0.0.1:200 INFO OK\r\n1 1080p3000 PLAYING\r\n\r\n
[2021-03-23 14:14:35.354] [info] Received message from 127.0.0.1: CLS\r\n
[2021-03-23 14:14:35.361] [info] Sent message to 127.0.0.1:200 CLS OK\r\n"CHURCH-FIELD" STILL 1719942 20210322205428 NaN 0/0\r\n\r\n

Here is the contents of the html file:

<title>lower-third-responsive.html</title> <script type="text/javascript"> function play(){console.log('play');} function stop(){console.log('stop');} function update(){console.log('update');} </script> <style type="text/css"> html { /* Explicitly set background color */ background-color: transparent; box-sizing: border-box; overflow: hidden; font-family: Verdana, Geneva, sans-serif; font-size: 4vh; color:#FFF; } #container {position:absolute; bottom:2vh; left:1vw; right:1vw; padding:1em 0 1em 7.5em; text-shadow:.1vw .1vh #444;} #container img{height:auto; width:95vw; position:absolute; bottom:0; left:0; z-index:0; } .line{position:relative; float:left; z-index:1; clear:both;} .main{font-size:4vh;} .sub{font-size:1vh;} </style>

This is a test!

More test words.

[mint-dewit]

If you installed through Debian Package manger then CEF will not be included for licensing reasons I think.

[lightning-software]

How do I install CEF, then?

[lightning-software]

I couldn't find it in my package manager, easily....

[mint-dewit]

It has to be included at compile time, which should be pretty easy to do if you have docker installed: https://github.com/CasparCG/server/blob/master/BUILDING.md#linux

[lightning-software]

I followed that guide and got *** stack smashing detected *** when trying to run it. I'm sooooooooo frustrated.