Checkbox label fonts are transparent in configure meeting window

[chamalis]

The current main (01e6dcd) when built under, Ubuntu 22.04 with GTK 3.0, gives almost transparent, (not visible), fonts, in the "Host meeting" dialog, as show in the screenshot below:

Some system info

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.4 LTS
Release:	22.04
Codename:	jammy

$ ./bin/wahay --version
Wahay (commit: 01e6dcd (01e6dcde1d6fb440a46c132289feea41b252848a) tag:  built: 2024-09-10 10:58:27)

$ uname -a
6.8.0-40-generic #40~22.04.3-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 30 17:30:19 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

$ ldd bin/wahay | grep -i gtk
libgtk-3.so.0 => /lib/x86_64-linux-gnu/libgtk-3.so.0 (0x000071851d800000)

$ strings bin/wahay | grep -i libgtk
libgtk-3.so.0

$ pkg-config --modversion gtk+-3.0
3.24.33

Same if installed from the repo:

wahay/jammy,now 0.1-1 amd64 [installed]

Steps to reproduce

1. git clone https://github.com/digitalautonomy/wahay/
2. cd wahay
3. make clean && make
4. ./bin/wahay
5. Click on "Host a meeting"

Other platforms

I wasn't able to reproduce in a VM with Fedora 40 (both XFCE & Gnome), with only diff being that pkg-config returns 3.24.43 instead of 3.24.33.