I've had a look at the log and there are a number of things that might be relevant.
The dome seems to connect successfully, then there's a failed attempt to connect to a dome driver using COM7. This might be SGP attempting to connect for a second time to a dome driver that will only accept one connection, the first connection stops the second one. I'm not at all sure about this though.
There's a timeout on CanSetShutter. This looks like a bug in the Pulsar dome, it should return false if the shutter can't be moved.
There's also an input string was not in the correct format error from the dome, it appears to be on CanSetShutter and on Slewing.
It may be worth seeing if there is a dome driver log and definitely contacting Pulsar. The errors seem to be reported by the dome driver and they may have an insight into what is happening.
SGP appears to be the messenger here, nothing more.
Chris