BetaAnalyticsDataClient not found

@wsantell - I am facing the same issue, did you fix this error?
TypeError: Google\Analytics\Data\V1beta\Client\BetaAnalyticsDataClient::runReport(): Argument #1 ($request) must be of type Google\Analytics\Data\V1beta\RunReportRequest, array given

In GoogleAnalyticsReportsApiFeed class the arguments needs to be pass as RunReportRequest and GetMetadataRequest objects as the following example:

  /**
   * Call a static drupal function.
   */
  public function __call($func, $params) {
    $icached = &drupal_static(__FUNCTION__);
    $tthis = $this;

    $bind = [
      'getMetadata' => static function () use ($tthis) {
        // Create the GetMetadataRequest object
        $request = new GetMetadataRequest();
        
        $property = $tthis->property;
        $request->setName("properties/{$property}/metadata");
    
        // Call the getMetadata method with the GetMetadataRequest object
        return $tthis->client->getMetadata($request);
      },
    ];

    $params = \is_array($params) ? $params : [];
    $params[0] = \is_array($params[0] ?? FALSE) ? $params[0] : [];
    $params[0] += ['property' => 'properties/' . $this->property];

    // Check if cache is available.
    $cache_options = [
      'cid' => NULL,
      'bin' => 'default',
      'expire' => self::google_analytics_reports_api_cache_time(),
      'refresh' => FALSE,
    ];

    if (empty($cache_options['cid'])) {
      $cache_options['cid'] =
        'google_analytics_reports_data:' .
        md5(serialize(array_merge($params, [$func])));
    }

    // Check for internal cached.
    if ($icached[$cache_options['bin']][$cache_options['cid']] ?? FALSE) {
      return $icached[$cache_options['bin']][$cache_options['cid']];
    }

    // Check for DB cache.
    $cache = $this->cacheFactory
      ->get($cache_options['bin']);
    $cache = $cache ? $cache->get($cache_options['cid']) : FALSE;

    if (
      !$cache_options['refresh']
      && isset($cache)
      && !empty($cache->data)
      && $cache->expire > $this->time->getRequestTime()
    ) {
      $this->fromCache = TRUE;

      return $cache->data;
    }

    try {
      if (\in_array($func, array_keys($bind), TRUE)) {
        $ret = \call_user_func_array($bind[$func], $params);
      }
      else {
        // Create a RunReportRequest object
        $request = new RunReportRequest();
    
        // Set the property ID (replace with your actual property ID)
        $propertyId = 'properties/' . $this->property;
        $request->setProperty($propertyId);
    
        // Create a DateRange object and set the dates
        $dateRange = new DateRange();
        $dateRange->setStartDate('2023-01-01');
        $dateRange->setEndDate('2023-12-31');
        $request->setDateRanges([$dateRange]);

        $dimension1 = new Dimension();
        $dimension1->setName('city');

        $dimension2 = new Dimension();
        $dimension2->setName('deviceCategory');

        // Add the dimensions to the request
        $request->setDimensions([$dimension1, $dimension2]);

        // Create Metric objects
        $metric1 = new Metric();
        $metric1->setName('eventCount');

        $metric2 = new Metric();
        $metric2->setName('totalUsers');

        // Add the metrics to the request
        $request->setMetrics([$metric1, $metric2]);

        // Now pass the RunReportRequest object to the runReport() method
        $ret = \call_user_func_array([$this->client, $func], [$request]);
      }
    }
    catch (ApiException $e) {
      $this->messenger->addMessage($this->t('Error occurred! @e', ['@e' => $e]), 'error');
      return FALSE;
    }
    catch (ValidationException $e) {
      $this->messenger->addMessage($this->t('Validation error: @e', ['@e' => $e]), 'error');
      return FALSE;
    }

    if ($ret) {
      $icached[$cache_options['bin']][$cache_options['cid']] = $ret;
      $this->cacheFactory
        ->get($cache_options['bin'])
        ->set($cache_options['cid'], $ret, $cache_options['expire']);
    }

    return $ret;
  }

Providing a merge request to resolve this.

Hi

I got the same problem when uploading the credintials json file in the Initial setup.

"There was an authentication error. Message: Class "Google\Analytics\Data\V1beta\BetaAnalyticsDataClient" not found."

It seems that the namespace is not correct.

Below is the correct one :

Google\Analytics\Data\V1beta\Client\BetaAnalyticsDataClient;

Will let someone who's setting up the module fresh reconfirm and mark RTBC, but for what it's worth, this fixed the issue for me after having previously set things up.