If your server is on 1.19 you need to get the latest development build of ProtocolLib from their CI (direct link here).

Changes:

• Created a official discord server for support.
  • This update changes many things internally so if you have any issues feel free to reach out to me there or here on SpigotMC.
• Adds support for specifying a render time.
  • Render time controls how often the plugin will apply placeholders, variables and any text transformations to each line.
  • Because of this scoreboards update on a per player basis instead of globally.
• Adds support for greater and less than conditions.
  
• Adds support for disabling or preventing other scoreboards from overriding SimpleScore. (config: compatibilityMode).
• You can now negate conditions by prefixing the condition name with a ! (exclamation mark).
• You can now use nested else configurations to define what a user will see if conditions aren't met.
• Adds language file for Simplified Chinese.
• Many internal changes and optimizations.

This update includes features requested by SimpleScore users, if you have anything you would like to see added feel free to reach out to me.