If our platform is unable to communicate with your server host or find the API endpoints for SugarCRM, you may receive this error. Below are some steps to take to troubleshoot the issue:
1. Make sure that you have the API endpoint paths properly configured in:
2. Firewall: Allow access via Port 80 and Port 443 to INBOX25 (if your CRM is hosted behind a Firewall)Read Article
3. If you're not sure if your CRM is reachable on the web, run a test using Pingdom:
Enter your CRM domain and click 'Test'
The bottom line is that we can't seem to communicate with your CRM. Until we can successfully establish a connection, we won't be able to connect our integration at any level.
If your CRM is hosted locally on site and it cannot be accessed from an outside network via the web, then you will not be able to utilize our integration.