Web error on displaying info about AirFiber 4X and 5X

Hello,
i have a problem with displaying info from AirFiber 4X and 5X. Error from logs:
[2020-05-19 08:47:51] production.ERROR: Invalid argument supplied for foreach() {“userId”:1,“exception”:"[object] (ErrorException(code: 0): Invalid argument supplied for foreach() at /opt/librenms/app/Http/Controllers/DeviceController.php:133)
[stacktrace]
#0 /opt/librenms/app/Http/Controllers/DeviceController.php(133): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError(2, ‘Invalid argumen…’, ‘/opt/librenms/a…’, 133, Array)
#1 /opt/librenms/app/Http/Controllers/DeviceController.php(75): App\Http\Controllers\DeviceController->buildDeviceGraphArrays(Object(App\Models\Device))
#2 [internal function]: App\Http\Controllers\DeviceController->index(Object(Illuminate\Http\Request), 845, ‘overview’, ‘’)
#3 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(54): call_user_func_array(Array, Array)
#4 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(45): Illuminate\Routing\Controller->callAction(‘index’, Array)
#5 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Route.php(219): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(App\Http\Controllers\DeviceController), ‘index’)
anyone have similar problem?