RHEL 9系统中Flathub应用字体显示异常问题求助

大家好，我在RHEL 9系统的电脑上从Flathub安装了不少应用，比如g4music、Amberol、Color Picker等等，但这些应用的界面都没法正常显示，完全处于不可用的状态，具体情况可以看附带的截图。

我试着启动g4music时，终端输出了这些内容：

Enable ReplayGain: false

Enable Pipewire: false

Found 696 songs in 0.004244 seconds

Parse MP4 Error read_all

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.108: failed to create cairo scaled font, expect ugly output. the offending font is 'Cantarell Bold 9'

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.108: font_face status is: file not found

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.108: scaled_font status is: file not found

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.109: failed to create cairo scaled font, expect ugly output. the offending font is 'Cantarell Bold 9'

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.109: font_face status is: file not found

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.109: scaled_font status is: file not found

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.109: failed to create cairo scaled font, expect ugly output. the offending font is 'Cantarell 11'

(com.github.neithern.g4music:2): Pango-WARNING **: 20:55:18.109: font_face status is: file not found

启动Color Picker时的终端输出是：

(gcolor3:2): Pango-WARNING **: 20:58:35.707: failed to create cairo scaled font, expect ugly output. the offending font is 'Cantarell 11'

(gcolor3:2): Pango-WARNING **: 20:58:35.707: font_face status is: file not found

(gcolor3:2): Pango-WARNING **: 20:58:35.707: scaled_font status is: file not found

(gcolor3:2): Pango-WARNING **: 20:58:35.708: failed to create cairo scaled font, expect ugly output. the offending font is 'Cantarell 11'

(gcolor3:2): Pango-WARNING **: 20:58:35.708: font_face status is: file not found

(gcolor3:2): Pango-WARNING **: 20:58:35.708: scaled_font status is: file not found

** (gcolor3:2): WARNING **: 20:58:35.712: Cannot count number of items: Key file does not have group “Colors”

从这些警告信息来看，问题应该和字体有关，尤其是Cantarell字体找不到，但我对字体相关的问题没什么处理经验，想请教大家：这个问题到底是怎么回事？有没有可行的解决办法？

备注：内容来源于stack exchange，提问作者jplc