After checking your content  via database , I see that the "content" text filed is use 65,535 characters for saving it ( include words and html code ) . It means that it is the limit of text type of mysql . For more information , you can check : https://www.electrictoolbox.com/maximum-length-mysql-text-field-types/ 

In case you want more than 65,534 characters , you need to customize to change the "content" from "TEXT"  to " MEDIUMTEXT or LONGTEXT . If you are a developer , you can follow the guide bellow : 

1. Change the type of "content" filed of Pages table from "TEXT" to "MEDIUMTEXT" or "LONGTEXT".

2. Open the source file : yoursite/app/Plugin/Page/Controller/PagePluginsController.php then insert the code :

$pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$id}");
if($pageTmp){
    $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
}

at line 50 .

3. Open the file : yoursite/app/Plugin/Page/Controller/PagesController.php then insert the code bellow : 

if(isset($page["Page"]["id"])){
    $pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$page["Page"]["id"]}");
    if($pageTmp){
        $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
    }
}

In case you don't familiar with it , you can submit a ticket to request for  customization work.

After checking your content  via database , I see that the "content" text filed is used 65,535 characters for saving it ( include words and html code ) . It means that it is the limit of text type of mysql . For more information , you can check : https://www.electrictoolbox.com/maximum-length-mysql-text-field-types/ 

In case you want more than 65,534 characters , you need to customize to change the "content" from "TEXT"  to " MEDIUMTEXT or LONGTEXT . If you are a developer , you can follow the guide bellow : 

1. Change the type of "content" filed of Pages table from "TEXT" to "MEDIUMTEXT" or "LONGTEXT".

2. Open the source file : yoursite/app/Plugin/Page/Controller/PagePluginsController.php then insert the code :

$pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$id}");
if($pageTmp){
    $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
}

at line 50 .

3. Open the file : yoursite/app/Plugin/Page/Controller/PagesController.php then insert the code bellow : 

if(isset($page["Page"]["id"])){
    $pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$page["Page"]["id"]}");
    if($pageTmp){
        $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
    }
}

In case you don't familiar with it , you can submit a ticket to request for  customization work.

After checking your content  via database , I see that the "content" text filed is used 65,535 characters for saving it ( includes words and html code ) . It means that it is the limit of text type of mysql . For more information , you can check : https://www.electrictoolbox.com/maximum-length-mysql-text-field-types/ 

In case you want more than 65,534 characters , you need to customize to change the "content" from "TEXT"  to " MEDIUMTEXT or LONGTEXT . If you are a developer , you can follow the guide bellow : 

1. Change the type of "content" filed of Pages table from "TEXT" to "MEDIUMTEXT" or "LONGTEXT".

2. Open the source file : yoursite/app/Plugin/Page/Controller/PagePluginsController.php then insert the code :

$pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$id}");
if($pageTmp){
    $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
}

at line 50 .

3. Open the file : yoursite/app/Plugin/Page/Controller/PagesController.php then insert the code bellow : 

if(isset($page["Page"]["id"])){
    $pageTmp = $this->Page->query("SELECT content FROM {$this->Page->tablePrefix}pages WHERE id={$page["Page"]["id"]}");
    if($pageTmp){
        $page['Page']['content'] = $pageTmp[0]["pages"]["content"];
    }
}

In case you don't familiar with it , you can submit a ticket to request for  customization work.