The plugin is in an invalid state, DISABLED, that doesn't support a transition to enabled. Most likely, it was disabled due to a timeout.
one could be increasing the timeout and restart the instance
you also may want to read this article
https://confluence.atlassian.com/display/JIRAKB/JIRA+System+Plugin+Timeout+While+Waiting+for+Plugins+to+Enable
other could be checking plugins/installed-plugins DIR inside jiras install_dir and check if there maybe dupes for the specific plugins...
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