httpFileupload plugin install error

Openfire Plugins
1

when I install httpfileuplad plugin I got the error

2019.06.17 19:58:34 ERROR [pool-267-thread-1]: org.jivesoftware.openfire.container.PluginManager - An exception occurred while loading plugin ‘httpfileupload’:
java.lang.NoClassDefFoundError: com/google/common/cache/CacheBuilder
at nl.goodbytes.xmpp.xep0363.SlotManager.<init>(SlotManager.java:46) ~[httpfileuploadcomponent-1.1.3.jar:?]
at nl.goodbytes.xmpp.xep0363.SlotManager.getInstance(SlotManager.java:55) ~[httpfileuploadcomponent-1.1.3.jar:?]
at org.igniterealtime.openfire.plugins.httpfileupload.HttpFileUploadPlugin.initializePlugin(HttpFileUploadPlugin.java:52) ~[httpFileUpload-lib.jar!/:?]

can someone help me

2

seems your lib is conflicting or missing can you share which version you are trying on which openfire server?