No Device Found error means that you don’t have a device group realm with the relevant device group. 

Take the following steps to troubleshoot:

Connection Refused

No Device Found

Backspace Error

Kron PAM - Support & Maintenance Guide

KronPAM- Support & Maintenance Guides

Configuring Monitoring in Kron PAM

Configuring kronpam-watchdog

Monitoring System Health

Checking Service Status from WEB GUI

Checking Service Status and Restarting Failed Services from Restricted CLI

System Health and Service Check

Checking Server Load

Checking Server Resource Usage

Checking Network Interface Status

Checking the Current OS Version and Host

Listing Last Reboot Events

Listing Last Shutdown Events

Operating System and Hardware Component Check

Checking, Starting, Stopping Replication Module

Replication Between Kron PAM Instances

Checking System Logs

Checking Web GUI and Related Modules

Checking SSH/Telnet Proxy Logs

Checking SFTP Proxy Logs

Checking HTTP Proxy Logs

Checking SQL Proxy Logs

Checking Mobile Tomcat Logs

Checking TACACS+ Logs

Checking RADIUS Logs

Checking PostgreSQL Logs

Checking Symmetricds Logs

Checking Watchdog Logs

Checking Reporting Logs

Checking Authentication Service Logs

Checking the GUACD logs

Checking OCR LOGS

Checking all logs

Kron PAM Log Check

Increasing Log Levels from System Log Viewer

Increasing the SSH/Telnet Proxy Log Level

Log Levels

Kron PAM Log Rotation and Deleting Old Logs

Kron PAM Outbound Ports

Kron PAM Inbound Ports

Required Ports of Kron PAM

Issues Encountered in SSH/Telnet sessions

Issues Encountered in RDP Sessions

Issues Related to Mail Configuration

When Web GUI is Unreachable

When the Mobile Application is Unreachable

When SSH/Telnet Proxy is Unusable

When the RDP Proxy is Unusable

When SFTP Proxy is Unusable

When An Instance Reboots Unexpectedly

When CPU Usage Reaches Threshold

When Memory Usage Reaches Threshold

When Disk Space Usage Reaches Threshold

When You Encounter an Error Occasionally

Recovering Several SAPM Secrets from Database

When Observed Data Inconsistency Between Two Instances

When You Need to Upload a New License File

Cases About Network, OS, Firewall

Solutions for Common Issues

Points of Consideration When Creating a Support Case

Opening a Support Case

Troubleshooting and Maintenance Guide