Rendering issue with "Add Addon" dialog

[Erotemic]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

I'm porting this issue from the hassio-zigbee2mqtt tracker here. Original issue is: zigbee2mqtt/hassio-zigbee2mqtt#710

Describe the behavior you expected

I am attempting to migrate my docker HA setup to running entirely within a VM. I have HA in a VM, and now the next step is to move MQTT and Zigbee2MQTT from docker to variants running inside the HA VM via addons. Installing MQTT was easy enough as it is part of core, but I'm having an issue installing Zigbee2MQTT via the instructions on this repo. I have recently upgraded to 2025.1.2, and I'm wondering if that might be part of the issue.

Here are the symptoms I'm seeing. On my main machine I navigate to this github README page and click the "ADD ADD-ON REPOSITORY TO MY HA) button. This pops up a page asking me to open the page in my home assistant. I set the URL to the VM's IP address and click "Open Link".

This is where I start encountering issues. It pops up my HA web interface with a dialog box, but it only contains a text box with the github URL in it and nothing else. I'm wondering if this is a rendering bug, and I just pressed enter in case there was some invisible button to accept something (probably not the best idea to blindly do that, but that's what I did). Next a similar dialog popped up with similar issues, and I stopped to write up this report.

The dialog I'm at now looks like this:

If I close the page and retry clicking the "ADD ADD-ON" button, it brings me back to that dialog.

It looks like the issue is a bad rendering because if I ctrl+shift+c in chrome to bring up the dev console I can see there are some invisible elements:

I'm not a web dev, so a bit out of my element here, I wanted to past the html for the elements, but for some reason it don't grab the entire thing? So here is a screenshot. It looks like the buttons just have no text.

Platform

Core: 2025.1.2
Supervisor: 2024.12.3
Operating System: 14.1
Frontend: 20250109.0

Steps to reproduce the issue

1. Navigate to https://github.com/zigbee2mqtt/hassio-zigbee2mqtt
2. Click the "ADD ADD-ON REPOSITORY TO MY HA" button
3. Click through the server IP prompts

At this point the bugged dialog shows up.

What version of Home Assistant Core has the issue?

2025.1.2

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

Chrome Version 131.0.6778.85 (Official Build) (64-bit)

Which operating system are you using to run this browser?

Ubuntu 24.04.1 LTS

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

No response

Additional information

No response