Some devices can't join to 5ghz Wi-Fi, only 2.4ghz.
There are 2 Wi-Fi radios in the DataHub, one is 2.4ghz, and the other 5ghz.
There is an option to change the 2 Wi-Fi radios around, so the 2.4ghz and the 5ghz change roles.
By default, the 2.4ghz connects your DataHub to the Wi-Fi networks supplying internet at your location, and the 5ghz is the access point that you use to connect your onboard devices like chart plotters to the DataHub
To change this around, you will need to go to the left menu Settings, then top menu Profiles then the section Swap Wi-Fi > Install
You will be disconnected from the DataHub Wi-Fi while it changes the settings.
Wait 30 seconds, then, on your device, go to Settings > Wi-Fi choose the DataHub, and connect to it again.
Then you will be connected to the DataHub with the 2.4ghz Wi-Fi instead.
Note, when you now want to connect the DataHub to the internet Wi-Fi you will be using the 5ghz Wi-Fi, so what you are connecting to will need to be compatible with that also.
If you don't see the Profiles tab, you may need to update the software on your DataHub.
Here is the link with info on how to check you have the latest version of the DataHub software.
Test it out, and see how you get on.
If you need to revert back, you can repeat the process to swap Wi-Fi back to the original settings. It is important to connect back to the DataHub Wi-Fi after 30 seconds to lock in the changes. If it is longer than 90 seconds before you connect back to the DataHub, the swap settings will be disregarded.