I can't connect new equipment to the MikroTik RBSXTG-5HPnD-SAr2 access point, what can I do?

Question

Mikrotik

There is MikroTik RBSXTG-5HPnD-SAr2 equipment, about 20 clients are connected from it, mostly equipment from MIKROTIK SXTSQ LITE5 (RBSXTSQ5ND) customers, now they have stopped producing this model and decided to try MIKROTIK SXTSQ 5, which seems to be more powerful. The following happens, when trying to connect a subscriber at a distance of more than 500 meters, the equipment perfectly sees MikroTik RBSXTG-5HPnD-SAr2 but does not connect, I add the error log in the screenshot, we thought the model was unsuccessful, ordered MikroTik DISC Lite5, the same thing happens when this equipment approaches closer than 500 meters (line of sight everywhere), the equipment connects, if you take the old MIKROTIK SXTSQ LITE5, it connects without problems and at a distance of under 3 km. Where to look?