The log doesn’t keep track of network events/issues. One thing we know for sure is that when using static IP, the firmware assumes the netmask is 255.255.255.0, so it doesn’t give you the option to change netmask. This can be easily fixed. I wanted to ask you about the netmask of your office network, in order to confirm whether this is indeed the cause of the issue.
On the other hand, the DHCP should work — i.e. if you try the controller at office with DHCP, does it still not work?