When I try and change the stellarmate Host Name using the stellarmatetools app it fails:

stellarmate@stellarmate:~ $ sudo stellarmatetools
libEGL warning: DRI2: failed to authenticate
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Local Host "stellarmate"
Interface "lo" QFlags<QNetworkInterface::InterfaceFlags>(IsUp|IsRunning|IsLoopBack)
IP Entry: QHostAddress("127.0.0.1")
IP Entry: QHostAddress("::1")
Interface "eth0" QFlags<QNetworkInterface::InterfaceFlags>(IsUp|IsRunning|CanBroadcast|CanMulticast)
IP Entry: QHostAddress("192.168.86.66")
IP Entry: QHostAddress("fe80::87b5:8685:e378:ba71%eth0")
"::1"
Interface "wlan0" QFlags<QNetworkInterface::InterfaceFlags>(IsUp|IsRunning|CanBroadcast|CanMulticast)
IP Entry: QHostAddress("192.168.86.67")
IP Entry: QHostAddress("fe80::e65f:1ff:fe00:f15d%wlan0")
"127.0.0.1"
Requested host name is "plutoniborg"
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 786, resource id: 16778576, major code: 40 (TranslateCoords), minor code: 0
INDI: Error communicating with INDI Web Manager:  "Error transferring http://localhost:8624/api/hostname/plutoniborg - server replied: Method Not Allowed"

If I just edit the /etc/hostname file I can rename it but then the internal wifi hotspot doesn't work.