Error message

• Agenda: Bad call to list events. Check Google API Key or Calendar Address.

• Google_Service_Exception: Error calling GET https://www.googleapis.com/calendar/v3/calendars/nemarluk.school%40gmail.com/events?orderBy=startTime&singleEvents=true&timeMin=2022-04-29T00%3A00%3A00%2B09%3A30&timeMax=2023-05-29T00%3A00%3A00%2B09%3A30&maxResults=5&timeZone=Australia%2FDarwin&key=AIzaSyATOtwbJeRKyvzAb-sl8JdZbYUUGMpKLQY: (400) API key not valid. Please pass a valid API key. in /home/nemarluk/public_html/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php:83
  Stack trace:
  #0 /home/nemarluk/public_html/sites/all/libraries/google-api-php-client/src/Google/Http/REST.php(41): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client))
  #1 /home/nemarluk/public_html/sites/all/libraries/google-api-php-client/src/Google/Client.php(564): Google_Http_REST::execute(Object(Google_Client), Object(Google_Http_Request))
  #2 /home/nemarluk/public_html/sites/all/libraries/google-api-php-client/src/Google/Service/Resource.php(227): Google_Client->execute(Object(Google_Http_Request))
  #3 /home/nemarluk/public_html/sites/all/libraries/google-api-php-client/src/Google/Service/Calendar.php(1561): Google_Service_Resource->call('list', Array, 'Google_Service_...')
  #4 /home/nemarluk/public_html/sites/all/modules/agenda/agenda.module(498): Google_Service_Calendar_Events_Resource->listEvents('nemarluk.school...', Array)
  #5 /home/nemarluk/public_html/sites/all/modules/agenda/agenda.module(316): _agenda_load_google('nemarluk.school...', 'public', Object(stdClass))
  #6 /home/nemarluk/public_html/sites/all/modules/agenda/agenda.module(213): agenda_get_events(Object(stdClass))
  #7 /home/nemarluk/public_html/sites/all/modules/agenda/agenda.module(160): agenda_display_block('1')
  #8 /home/nemarluk/public_html/includes/module.inc(934): agenda_block_view('1')
  #9 /home/nemarluk/public_html/modules/block/block.module(910): module_invoke('agenda', 'block_view', '1')
  #10 /home/nemarluk/public_html/modules/block/block.module(689): _block_render_blocks(Array)
  #11 /home/nemarluk/public_html/modules/block/block.module(318): block_list('front-calendar')
  #12 /home/nemarluk/public_html/modules/block/block.module(270): block_get_blocks_by_region('front-calendar')
  #13 /home/nemarluk/public_html/includes/common.inc(5995): block_page_build(Array)
  #14 /home/nemarluk/public_html/includes/common.inc(2796): drupal_render_page(Array)
  #15 /home/nemarluk/public_html/includes/common.inc(2656): drupal_deliver_html_page('        \n  \n  \n...')
  #16 /home/nemarluk/public_html/includes/menu.inc(542): drupal_deliver_page('        \n  \n  \n...', '')
  #17 /home/nemarluk/public_html/index.php(21): menu_execute_active_handler()
  #18 {main}