As a first step can you try renaming the watchdog exe file in the
watchdog/x86 folder of your Xibo installation folder, which will prevent the watchdog from being automatically started when Xibo starts?
For some reason it is detecting that there are too many
XiboClient.exe processes running and I am not sure why that would be the case.
After this does Xibo start, and if so, how many XiboClient.exe processes do you have running in Task Manager?