Endpoint Inspection not launching

End user on Win10 PC is unable to log into APM as the epi app fails to launch. Tried several browsers, reinstalled app with admin rights, tried installing BIG-IP Edge client and then trying again from a browser. The login simply doesn't move past this point and only gives the option to reinstall, relaunch or skip the endpoint inspection. Doesn't appear to be related to the AV on the machine either.

Any ideas? Something is clearly blocking it from running but it's not obvious what's doing it.

Thanks