Php 在左联接中未在laravel 7.1.1中找到列

我已将我的一个项目从laravel 5.2升级到7.1.1 以下查询在laravel 5.2中运行良好

$query = DB::table("user_table as users")
                ->leftJoin("employee_table as employees", "employees.user", "=", "users.id")
                ->leftJoin("departements_table as departements", "departements.user", "=", "users.id")
                ->leftJoin("salaries_table as salaries", "salaries.user", "=", "users.id")
                ->where("smscampaigns.pic",'=','')
                ->select([
                "users.log_id",
                "users.lead_id",
                "users.crm_campaign_id",
                "departements.email",
                "salaries.campaign_name",
                "users.phone",
                "users.sms_text",
                "users.status",
                "users.error_code",
                DB::raw("DATE_FORMAT({$tp}users.sent_at, '" . DB_DATE_FORMAT . "') AS sent_at")
            ])->orderBy("smsLog.sent_at", "desc");

但在移动到laravel 7.1.1之后，它显示了以下错误

Column not found users.pic in where clause

有人能帮我吗？ 多亏了所有预先设置

运行1）php artisan配置：缓存2）php artisan视图：清除3）php artisan路由：清除