Backpack wont open

[tarokie]

Information

Environment information
[17:46:56] [Server thread/INFO]: ##### Start Minepacks version info #####
[17:46:56] [Server thread/INFO]: Minepacks: 2.4.31.4-T20240629215752
[17:46:56] [Server thread/INFO]: Server: 4214-Spigot-146439e-6ce1726 (MC: 1.21)
[17:46:56] [Server thread/INFO]: Java: 21.0.3
[17:46:56] [Server thread/INFO]: ##### End Minepacks version info #####:

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no:

no:

Server/crash log

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Plugin config (optional)

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Details

Every time I try to open the back pack, it gives an error message in chat instead

I'm not sure, I tried deleting and redownloading but still keeps giving the same message

Backpack to open

Error message:

[GeorgH93]

Please update your spigot version.