Error in XML : Empty XML namespace is not allowed

Hi everyone .

I,m trying to read a webpage ( which is dictionary webpage ) with matlab and convert html data to text with extractHTMLText for get some informations but MATLAB gives this error :

" Error in XML : Empty XML namespace is not allowed . "

Since I am not a professional programmer , I am not familiar with the namespace and its errors .

code :

    url='https://www.vocabulary.com/dictionary/river';
    options = weboptions('Timeout', 10);
    code = webread(url,options);
    textData = extractHTMLText(code);

complete error ( test is my script name ) :

 
    Error using htmlTree (line 67)
    Error in XML: xmlns:fb: Empty XML namespace is not allowed
    
    Error in extractHTMLText (line 40)
    tree = htmlTree(code);
    
    Error in test (line 12)
    textData = extractHTMLText(code)

As you can see , MATLAB has a problem only in the text analysis section of the read web page ( empty namspace error ) . I also checked the " code " variable , which has correctly saved the information of the web page .

Can anyone help me to fix this error ? Thanks .