How to solve rendering Error?

I am using a web panel module and that showing error.
screen shot->

Error : Error rendering ‘com.vps.jira.plugin.Archiveing-Attachment:archiving-indicator’. Please contact your Jira administrators. ->
public Map<String,Object> getContextMap(ApplicationUser user, JiraHelper jiraHelper)
String get=Optional.ofNullable(“myinput”).orElse("");
Map<String, Object> contextMap = Maps.newHashMap();
//Map contextMap = new HashMap();
Issue currentIssue = (Issue)jiraHelper.getContextParams().get(“issue”);
CustomFieldManager customFieldManager = ComponentAccessor.getCustomFieldManager();
//CustomField cf = customFieldManager.getCustomFieldObjectByName(“Group Picker”);
CustomField cf = customFieldManager.getCustomFieldObject(“Group Picker”);
Object val = currentIssue.getCustomFieldValue(cf).toString();
log.error(“CustomField VAlue@@@@”+val);
if(val == null || val =="")
contextMap.put(“daysAwayFromDueDate”, currentIssue);
return contextMap;
return contextMap;

using JIRA 7.13.0.
anyone help me I don’t understand why an exact error has occurred?

HI @shitalchande,

Please explain your problem is details here and Please explain where are you getting this error plugin development time or plugin upload time.

HI SarikaDalalji Mam,
I am developing an (Attachment)Archiving Plugin and Dearchiving Plugin. and the plugin is uploaded successfully but Dearchive is not working and showing an error such as! [Error rendering ‘com.vps.jira.plugin.Archiveing-Attachment:archiving-indicator’. Please contact your Jira administrators.]