Hello Everyone,
Session Id invalid when tried to insert listviews using SOAP
I need to create list view through custom LWC comp. For this I am using below code in apex class. ---------
HTTP h = new HTTP(); 
HTTPRequest req = new HTTPRequest(); 
req.setMethod('POST'); req.setHeader('Content-Type', 'text/xml'); 
req.setHeader('SOAPAction', 'create'); 
String b = '<?xml version="1.0" encoding="UTF-8"?>'; 
b += '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">'; 
b += '<soapenv:Header>'; 
b += '<ns1:SessionHeader soapenv:mustUnderstand="0" xmlns:ns1="http://soap.sforce.com/2006/04/metadata">'; 
b += '<ns1:sessionId>' + UserInfo.getSessionId() + '</ns1:sessionId>'; 
b += '</ns1:SessionHeader>'; b += '</soapenv:Header>'; 
b += '<soapenv:Body>'; 
b += '<create xmlns="http://soap.sforce.com/2006/04/metadata">'; 
b += '<metadata xsi:type="ns2:ListView" xmlns:ns2="http://soap.sforce.com/2006/04/metadata">'; 
//This is the API name of the list view 
b += '<fullName>Case.Test345_ListView</fullName>'; 
b += '<booleanFilter>1</booleanFilter>'; 
//Columns you want to display 
b += '<columns>NAME</columns>'; 
b += '<columns>CREATED_DATE</columns>'; 
//Filterscope should be set to Everything for every one to be able to access this List view 
b += '<filterScope>Everything</filterScope>'; 
// Enter the filter that you want to set 
b += '<filters>'; 
b += '<field>NAME</field>'; 
b += '<operation>equals</operation>'; 
b += '<value>Test123 </value>'; 
b += '</filters>'; 
b += '<label>Test345 View</label>'; 
b += '</metadata>'; 
b += '</create>'; 
b += '</soapenv:Body>'; 
b += '</soapenv:Envelope>'; 
req.setBody(b); 
req.setCompressed(false); 
// Set this to org's endpoint and add it to the remote site settings. req.setEndpoint('https://ap1.salesforce.com/services/Soap/m/25.0'); 
HTTPResponse resp = h.send(req); 
System.debug(resp.getBody());
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I tried to get response through anonymous window, getting an error like. USER_DEBUG This error usually occurs after a session expires or a user logs out. Decoder: DataInDbSessionKeyDecoder</faultstring></soapenv:Fault></soapenv:Body></soapenv:Envelope>....
1. I did logout and login. 
2.Changed session settings.
Eventhough its not working. I tried system.debug(userinfo.getsessionId()); in anonymous, the result is SESSION_ID_REMOVED.
How to figure it out. Does this not work in sandbox. NOTE: The code perfectly working in our personal DEV ORG. I can successfully insert list views when executed in anonymous window. But cannot in this sandbox. Please help.

Thanks