Unable to deploy content to Firewall from Panorama using XML API

• Cannot deploy content to firewall from Panorama using XML API. Running the API's as follows: 

<request><batch><content><check></check></content></batch></request> 
<request><batch><content><download><file>panupv2-all-apps-8157-5479</file></download></content></batch></request> 
*wait 5 minutes* 
<request><batch><content><upload-install><file>panupv2-all-apps-8157-5479<devices>serial</devices></file></upload-install></content></batch></request>

• Next alert is displayed:

<response status="error">
<msg>
<line>Failed to schedule deployment job</line>
</msg>
</response>

•  Panorama
•  PAN-OS v8.1 or later

• In PAN-OS 8.1 and onwards there is a new content validation being triggered.
• It is possible to disable it using "skip-content-validity-check" header.

1. Modify the order of the API query so content version is between the XML parameters "<file></file>"
2. Serial Number should be between "<devices></devices>" following the XML standard as well
3. Add the skip-content-validity-check in order to bypass the validation checking, for instance following next example: