3249300 - Secure https connection fails and error is displayed: "The database is not available." - SAP PD

• Secure connections (SSL/TLS) have been enabled for PD Web according to documentation
  https://help.sap.com/docs/SAP_POWERDESIGNER/1f914d86319d43b7b2402532666583c0/c80f1dc66e1b10149834b423c1b9caf0.html
  
  
• Error is displayed when loading PD Web:
     The database is not available.
     Please contact your administrator or wait and retry later.
  
  
• File cmrserver.log reports:
     [] ERROR localhost-startStop-2 2022/09/14 07:53:20 BST com.sap.powerdesigner.data.RequestContext.get: RequestContext.java(188) *** Attempted to retrieve com.sybase.cmr.infra.Session WITH NO active context (null).
  
  
• File nodeserver.log reports:
     [INFO] 2022-09-16T06:15:58.765Z Loading https certificates from C:/ssl/official_CA.crt
     [ERROR] 2022-09-16T06:15:58.783Z [redirectRequest]   Error: unable to verify the first certificate
     [ERROR] 2022-09-16T06:15:58.783Z Invalid status code: UNABLE_TO_VERIFY_LEAF_SIGNATURE. Replace it with 500

SAP PowerDesigner (PD) 16.7

self, CR#827165, CR827165, 827165 , KBA , BC-SYB-PD , PowerDesigner , Known Error