This thread:
Is there a possible relation? If both are snaps, I wonder if snap itself corrupted.
Have these problems appeared simultaneously of far apart?
Otherwise: it is possible Chromium is failing to launch due to updated fonts not loading. A suggested workaround;
Remove the configuration files and launch:
sudo rm /var/cache/fontconfig/*
rm ~/.cache/fontconfig/*
sudo fc-cache -r -v
rm -rf ~/snap/chromium/common/.cache/fontconfig/
chromium-browser