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Uncaught Error: Call to a member function getEndpointUrl() on null in /home/magento/backend/app/code/Wac/InstagramFeed/Model/Api/AbstractApi.php:124

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The getendpointUrl getting null

public function getEndpointUrl(): string
    {
    return $this->getStoreConfigValue(self::XML_PATH_INSTAGRAM_API_ENDPOINT_URL);
}



XML_PATH_INSTAGRAM_API_ENDPOINT_URL it contains value it working fine