Dynmap v3.7 Snapshot 948 on Spigot 1.21.3 server : NoSuchMethodError

[Selunie]

template is bold sample data is italicized

Issue Description: Dynmap semi-crashes at the server startup (NoSuchMethodError and unable to access to commands).

• Dynmap Version: 3.7 /s948
• Server Version: CraftBukkit version 4358-Spigot-5eb8a94-6bb0db5 (MC: 1.21.3) (Implementing API version 1.21.3-R0.1-SNAPSHOT)
• Pastebin of Configuration.txt: https://pastebin.com/p1Vhcmab
• Server Host (if applicable): OVH
• Pastebin of crashlogs or other relevant logs: https://pastebin.com/bitxqhUf
• Other Relevant Data/Screenshots: /

• Steps to Replicate: Rebuilt with the recent official BuildTools.jar file and upgraded the Spigot server from 1.21.2 to 1.21.3 yesterday

  [x] I have looked at all other issues and this is not a duplicate
  [x] I have been able to replicate this

[SomethingGeneric]

commenting to subscribe

[SomethingGeneric]

(encountering same error)

[NukeWorker]

ditto!