For the font issue, you may try clearing your font cache, per this post: https://ekiwi-blog.de/en/25084/linux-snap-applications-error-with-fonts-only-rectangles-are-displayed/
fc-cache -r
rm ~/.cache/fontconfig/*
sudo rm -f /var/cache/fontconfig/*
For the font issue, you may try clearing your font cache, per this post: https://ekiwi-blog.de/en/25084/linux-snap-applications-error-with-fonts-only-rectangles-are-displayed/
fc-cache -r
rm ~/.cache/fontconfig/*
sudo rm -f /var/cache/fontconfig/*