在此服务器上找不到请求的URL / chat // layercake / form_validation

In Codeigniter I am trying to call a function from form action and I get the following error:

requested URL /chat//layercake/form_validation was not found on this server.

<form class="form-horizontal" id="contact" data-toggle="validator" enctype="multipart/form-data" role="form" method="post" action="<?php echo base_url().'/layercake/form_validation'; ?>">
                <div class="form-group">
                    <label for="name" class="col-sm-2 control-label">Name</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="name" name="name" placeholder="First & Last Name" value="" required>
                        <div class="help-block with-errors"></div>
                    </div>
                </div>
                <div class="form-group">
                    <label for="email" class="col-sm-2 control-label">Email</label>
                    <div class="col-sm-10">
                        <input type="email" class="form-control" id="email" name="email" placeholder="example@domain.com" value="" required>
                        <div class="help-block with-errors"></div>
                    </div>
                </div>
                <div class="form-group">
                    <label for="message" class="col-sm-2 control-label">Message</label>
                    <div class="col-sm-10">
                        <textarea class="form-control" id="message" rows="4" name="message" required></textarea>
                        <div class="help-block with-errors"></div>
                    </div>
                </div>

                <div class="form-group">
                    <div class="col-sm-10 col-sm-offset-2">
                        <input id="submit" name="submit" type="submit" value="Send" class="btn btn-primary">
                    </div>
                </div>
                <div class="form-group">
                    <div   class="col-sm-10 col-sm-offset-2 alert">

                    </div>
                </div>
            </form>

Please help.

Change your action url base_url().'/layercake/form_validation'; to base_url().'layercake/form_validation';

Please look at your error. There are two // after chat.

Your action URL is wrong. Change action="<?php echo base_url().'/layercake/form_validation'; ?>" this as following in form tag

action="<?php echo site_url('layercake/form_validation'); ?>"