not able to add item using API explorer

I am just checking api explorer on the blow url but not able to add item

https://developer.ebay.com/my/api_test_tool?index=0&api=trading&call=AddFixedPriceItem&variation=xml

and got the following error

<?xml version="1.0" encoding="UTF-8"?>
<AddFixedPriceItemResponse 
  xmlns="urn:ebay:apis:eBLBaseComponents">
  <Timestamp>2021-01-13T11:57:48.985Z</Timestamp>
  <Ack>Failure</Ack>
  <Errors>
    <ShortMessage>Only Good &apos;Til Cancelled duration is supported for fixed price listings.</ShortMessage>
    <LongMessage>To help you sell your item, fixed price listings can only be listed with a Good &apos;Til Cancelled duration. The listing duration has been set to Good &apos;Til Cancelled.</LongMessage>
    <ErrorCode>21920214</ErrorCode>
    <SeverityCode>Warning</SeverityCode>
    <ErrorClassification>RequestError</ErrorClassification>
  </Errors>
  <Errors>
    <ShortMessage>The item specific Screen Size is missing.</ShortMessage>
    <LongMessage>The item specific Screen Size is missing. Add Screen Size to this listing, enter a valid value, and then try again.</LongMessage>
    <ErrorCode>21919303</ErrorCode>
    <SeverityCode>Error</SeverityCode>
    <ErrorParameters ParamID="0">
      <Value>The item specific Screen Size is missing.</Value>
    </ErrorParameters>
    <ErrorParameters ParamID="1">
      <Value>The item specific Screen Size is missing. Add Screen Size to this listing, enter a valid value, and then try again.</Value>
    </ErrorParameters>
    <ErrorParameters ParamID="2">
      <Value>Screen Size</Value>
    </ErrorParameters>
    <ErrorClassification>RequestError</ErrorClassification>
  </Errors>
  <Errors>
    <ShortMessage>The item specific Processor is missing.</ShortMessage>
    <LongMessage>The item specific Processor is missing. Add Processor to this listing, enter a valid value, and then try again.</LongMessage>
    <ErrorCode>21919303</ErrorCode>
    <SeverityCode>Error</SeverityCode>
    <ErrorParameters ParamID="0">
      <Value>The item specific Processor is missing.</Value>
    </ErrorParameters>
    <ErrorParameters ParamID="1">
      <Value>The item specific Processor is missing. Add Processor to this listing, enter a valid value, and then try again.</Value>
    </ErrorParameters>
    <ErrorParameters ParamID="2">
      <Value>Processor</Value>
    </ErrorParameters>
    <ErrorClassification>RequestError</ErrorClassification>
  </Errors>
  <Version>1177</Version>
  <Build>E1177_UNI_API5_19310878_R1</Build>
</AddFixedPriceItemResponse>

Please check to add item working or not?