2686120 - Opening Lumira Reports hangs or results in a spinning wheel, "Loading Modules"

• Lumira Reports cannot be opened through BI Launch Pad (BILP), opening a report results in a hanging / loading forever / spinning wheel behaviour, saying "Loading Modules"
• F12 Developer Tools traces in the browser show a HTTP 500 for the following call:
  http://<HOST>:8080/BOE/portal/1808141720/LumiraWebApp/zen/mimes/combined_static_includes_1.js?version=20171204132924 HTTP/1.1
  
  
• E2E trace (KBA 1861180) shows the following exceptions generated during the opening of the report:
  Message: A general backend exception occured: Executing request on server failed.
  Stack trace: java.lang.RuntimeException: A general backend exception occured: Executing request on server failed.
  <TRUNCATED>
  Caused by: com.sap.ip.bi.zen.boe.transport.exception.remote.ZenCommunicationException: Executing request on server failed.
  <TRUNCATED>
  Caused by: java.lang.NumberFormatException: null
  
  
• Lumira Server traces on 'High' from start up may show either of the following errors:
  com.businessobjects.framework.servers.platform.deployment.core.BeanComponent||[BeanComponent.getBean()] instance creation of bean TeamServerPJSService threw exception.
  java.lang.ExceptionInInitializerError: JCo initialization failed with java.lang.UnsatisfiedLinkError: <PATH>\sapjco3.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
  
  java.lang.RuntimeException: Not able to create instance of bean: class com.sap.framework.services.zen.Zen
  Caused by: java.lang.ExceptionInInitializerError: Native library sapjco3 is too old. Found library System-defined path to sapjco3.dll has version "721.800", but required is at least version "721.913".

• SAP BusinessObjects Business Intelligence Platform 4.x (BI 4.0 / 4.1 / 4.2)
• SAP Lumira Server for BI Platform
• Windows
• Linux / Unix 

KBA , BI-LUM-SRV-ADM , Lumira Server BI Platform Admin, Auth, Security , Problem