verbose output from the cURL request:

curl_getinfo output:
Array
(
    [url] => https://unifi.nxtcloud.co.za/
    [content_type] => 
    [http_code] => 302
    [header_size] => 170
    [request_size] => 59
    [filetime] => -1
    [ssl_verify_result] => 20
    [redirect_count] => 0
    [total_time] => 0.6525
    [namelookup_time] => 0.022251
    [connect_time] => 0.028925
    [pretransfer_time] => 0.043244
    [size_upload] => 0
    [size_download] => 0
    [speed_download] => 0
    [speed_upload] => 0
    [download_content_length] => 0
    [upload_content_length] => 0
    [starttransfer_time] => 0.652468
    [redirect_time] => 0
    [redirect_url] => https://unifi.nxtcloud.co.za/manage
    [primary_ip] => 155.93.206.196
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 192.168.50.3
    [local_port] => 36774
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
    [appconnect_time_us] => 43214
    [connect_time_us] => 28925
    [namelookup_time_us] => 22251
    [pretransfer_time_us] => 43244
    [redirect_time_us] => 0
    [starttransfer_time_us] => 652468
    [total_time_us] => 652500
    [effective_method] => GET
)

test result:
Controller connection success