Upgrade from 17 MR1 to MR2 breaks ImapPOP daemon

Question

Dear All, 
 I am quite busy during this months and I am not following the community (sorry about that to all users). Today I found the time to upgrade XG to latest MR (from 17 MR1 to MR2) and the POPIMAP daemon does not start. 
 See the screenshot. 
 
 Running services -S from advanced shell reports this status: 
 
 The warren service does not start. If I try to start it using the service command, the output is: 
 service warren:start -dsnosync 503 Service Failed 
 More info from warren.log file: 
 
 Regards

lferrara · Accepted Answer

ChrisKnight , 
 the certificate used by XG depends on the initial configuration. Mine is coming from v15 and default CA was used since then. Anyway I was able to fix it by switching to default_SSL_CA, restart the warren service from advanced shell, switch back the default CA and then restart the service again. 
 During the upgrade, the XG lost something. 
 It was working good since MR1. 
 Regards