How to fetch attachment issue

Hi,
Error: JIRA REST API returns java.lang.RuntimeException: Failed : HTTP error code : 404

I am using Smart attachment plugin 2.2.2 version and I am developing Meta Validation Plugin and that using URI “http://192.168.1.236:8082/rest/attach-cat/1.0/attachments/get?issueKey=” +issue for getting the issue ids. I am trying to use the JIRA rest API to get the issue is moved on one transition to another.
And I am using Jira is 7.13.0.!
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Smart Attachments 2.X no longer supports REST API, only Java API. Please drop an email at tech-support@stiltsoft.com with description of what you want to do.

Sincerely, Vadim