SUM execution phase hanging in 'Start JAVA' step

Good day

I'm trying to update the Java stack of a solman 7.1 stack 10 instance. I'm using SUM v1 SP10 patch0. Everything runs fine until  5.6 [Execution --> Start Java] which times out after a while.

Part of START-AS-JAVA.LOG:

Java instance =02

SCS instance = 03

Java instance = 02

SCS instance = 03

Output of sapcontrol -nr 02 -function GetVersionInfo

Calling the NWA from browser