When running the installable cloud app, the following error displays in the Web API console or in the PowerServer log (\Logging\logs\powerserver.log):
2021-01-27 01:28:32,094 ERROR PowerServer.Client.PowerServerClient.LogMessage [0] - MESSAGE: Failed to call the license server Api. (Error connecting to https://apipsoatest.appeon.com/.well-known/openid-configuration. A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond..)
Cause & Solution:
First, please note that it is possible that the PowerServer console may output the following error information but the application is still running properly. That is because the system allows a grace period in cases when PowerServer fails to validate the license. After the grace period, PowerServer will stop responding to the requests from the application.
The error here indicates that PowerServer cannot connect to https://apipsoatest.appeon.com. However, according to the latest information in PB Help, PowerServer is required to connect to the following Appeon websites. The cause of the error must be, the PowerServer Runtime version is too old. You shall manually update the PowerServer.Core and PowerServer.Api NuGet packages to the latest version.