IncompatibleClassChangeError on 1.20

[Phoenix616]

What is happening?

Plugin is no longer compatible with pre 1.21 versions due to changes to the API moving InventoryView from an abstract class to an interface -> error

What did you expect to happen?

For the plugin to load

Plugin Version

v3.12.3-SNAPSHOT (build 428)

Version Check

• [x] It is the latest development version available from https://ci.minebench.de/job/ChestShop-3/.
• [x] The version has support for this type of issue.

Server Version

Paper 1.20 (b17)

Server Log

Agreements

• [x] I have checked if there are already similar issues open.
• [x] I have provided all requested information and agree to the terms of the project's license, especially the part about no warranty.

Additional context

No response