You don’t say whether or not you ever had a connection with the meter. So, here are the easy things you can try (one at a time) based on other posts in this forum.
1. Sometimes the meter thinks it is still in shipping mode, so momentarily short the meter probes between ohm and common.
2. Open the case (2 screws) and press the tiny reset button (near the microSD card slot). This kind of reboots the meter. I use this a lot.
3. Remove the 2 batteries and check their voltage with another meter and replace if low. Some people have had dead batteries even if they haven’t used the meter much.
4. Reboot phones/tablets. Bluetooth BLE is crazy weird.
Hope one of these helps your meter.
— – – – Duane