I got information that there was a bug in 8.5 (2020-01-07). It has been fixed now.
This fix will be available in the upcoming released version of Standard ERP.
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...