Upgrade from phpbb3.0.14 to phpbb3.2 no access to ACP

Hello, I have just upgraded from 3.0.14 to the latest 3.2 phpbb but I have come up against an error while trying to access the ACP.
Here is the forum https://www.christchurchdorset.com/forum
Here is the error I receive once logged in and click the ACP...

General Error
Tried to redirect to potentially insecure url.

BACKTRACE

FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()

FILE: [ROOT]/includes/functions.php
LINE: 1789
CALL: trigger_error()

FILE: [ROOT]/ext/phpbb/viglink/event/acp_listener.php
LINE: 101
CALL: redirect()

FILE: (not given by php)
LINE: (not given by php)
CALL: phpbb\viglink\event\acp_listener->set_viglink_services()

FILE: [ROOT]/vendor/symfony/event-dispatcher/EventDispatcher.php
LINE: 184
CALL: call_user_func()

FILE: [ROOT]/vendor/symfony/event-dispatcher/EventDispatcher.php
LINE: 46
CALL: Symfony\Component\EventDispatcher\EventDispatcher->doDispatch()

FILE: [ROOT]/phpbb/event/dispatcher.php
LINE: 60
CALL: Symfony\Component\EventDispatcher\EventDispatcher->dispatch()

FILE: [ROOT]/includes/acp/acp_main.php
LINE: 478
CALL: phpbb\event\dispatcher->dispatch()

FILE: [ROOT]/includes/functions_module.php
LINE: 676
CALL: acp_main->main()

FILE: [ROOT]/adm/index.php
LINE: 82
CALL: p_master->load_active()

I am not used to using this support feature so huge apologises if I have placed my question in the wrong section.
Best regards
Michael