Certificate issue

Question

Hi 
 
 I'm using Sophos UTM 9 Firewall and recently I've faced the following issue with site certificate which is (" Certificate is not valid") 
 
 i tried this solution in this link but still it doesn't work 
 https://support.sophos.com/support/s/article/KB-000035452?language=en_US 
 
 what should i do to resolve this issue? 
 
 kind regards

PhilippRusch · Answer

Have a look here: 
 https://support.sophos.com/support/s/article/KB-000034264?language=en_US