When accessing the Infrastructure Reports in TSPS console (i.e. in TSPS console, click on Infrastructure Reports --> click on the three dots next to the TSIM server and click Manage), you are getting the below error:

"Initialization of connection is in progress, or the connectivity was lost between the Infrastructure Management Server and the Presentation server.

If you have configured a secure communication between the Presentation Server and Infrastructure Management Server, ensure that the Presentation Server certificate is imported into the Infrastructure Management Server."

In the TSPS TrueSight.log, you can see the below error:

[ComponentInit_2] c.b.t.c.s.s.p.s.StreamTSIMCommManager BMC_TS-BSR00009A    Could not create tsim wrapper :     TSIM Communication Manager Faced Error
com.bmc.bppm.wsclient.exception.ServerException: Call to Server failed : Response Status: 401 Message returned from server: {"responseTimeStamp":"2021-05-03T06:50:28","statusCode":"401","statusMsg":"Authentication failed. Invalid Username/Password OR Invalid/Expired Token"}
    at com.bmc.bppm.wsclient.impl.BPPMServerConnUsingSAPService.executeRequest(BPPMServerConnUsingSAPService.java:837)

Then, we have the following in the TSIM bppmws.log:
  
     javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateExpiredException: NotAfter: <<date>>

If you run pw p l command, TSIM is running fine and you can see that it's showing as connected in TSPS console -> Administration --> Components.


 

Check that none of the TSOM components' certificate has expired and ensure that the certificate has been deployed correctly.