IF you are not getting any update available then you have to update your device os then only this problem will be solved when I have updated the pro camera my phone Safari can't Establish a Secure Connection error so after updating the device I get the resolution.
Facing the same issue here with my Nokia 8, since the latest Pro Cam firmware I need to restart my device to get WiFi connection :(
I am not saying this is a fix but it might be worth a shot.
Network & Internet
3 dots top right
Reset Wi-Fi, mobile & Bluetooth
Press the mode button repeatedly on the front of the camera until “Set Up” appears on the screen. Select the red shutter button on top of the camera. For more visit HP Support