Error "Logon failed for RESTful Web Services. Contact system administrator." while logging into Fiori BI Launchpad

Error while Logging into Fiori BI Launchpad getting below.

Error "Logon failed for RESTful Web Services. Contact system administrator." 

Solution:

1. Navigate to Applications.

2. Right click on 'RESTful Web Service' and go to its Properties.

3. Change the Access URL pointing to an externally accessible IP or hostname. For ex, for VMware vCloud Director appliances, change the URL as "http://<External IP of vApp>:<port#>/biprws".This URL needs to be working from machine where the client browser is.

4. Click on 'Save & Close'.

Also check the following:

1.Ensure Restful web service is installed on the system, either on WACS or on any other supported webapp server

2. Ensure WACS is running without errors (not stopped or disabled) in the BI server environment, if restful is deployed on WACS, if it is deployed on supported webappserver, ensure the restful webapp is runing.

3. In case when restful is deployed on WACS - ensure the WACS port is accessible from the machine where the browser is being run (The call to Restful web service is made directly from the browser).Test from browser client machine:telnet <BISERVERHOSTNAME> <WACSPORT>