Error number nomenclature during communication channels installationSummaryDuring installation of various channels like Slack, Workplace or MS teams it might fail due to various reasons and the below error page is displayed. The URL will contain "instance_url.do?sysparm_proxy_err_code={Code}" The proxy error code in the URL can number from 1 to 9 and with these numbering we will identify the root cause of itRelated Linkserror_code nomenclature: Code = 1 Authorization deny Code = 2 Configuration error Code = 3 Request to slack/teams network error Code = 4 Slack/Teams does not send proper response Code = 5 Post to data centre error Code = 6 post to instance error (proxy can not connect to instance) Code = 7 Instance does not respond back with 200 Code = 8 Internal instance blocking Code = 9 Don't have admin(Global Admin, App admin and Cloud App admin.) credential The proxy error code in the URL will look like this instance_url.do?sysparm_proxy_err_code=6. Which means the proxy could connect to the instance