ClassNotFoundException warning in Extension Manager progress logs when installing a Pro app on a fresh XWiki instance

[ilieandriuta]

STEPS TO REPRODUCE

Environment: Windows 10 Pro 64bit, Firefox 93, using an instance of XWiki 12.10.10 on Tomcat 9.0.54/ Oracle 19c (reproduced also on a 13.8 Jetty+HSQL instance)

1. Start a fresh XWiki instance
2. Install a Pro application (tested with Active Directory Application 1.12 and File Manager Pro 2.5)
3. Observe the Extension Manager progress logs

EXPECTED RESULTS

There are no warnings/errors in EM progress logs.

ACTUAL RESULTS

On EM progress logs there is the following Warning:

Failed to register job in document [Home » Licenses » Code » LicensedExtensionUpgradeJob]: ClassNotFoundException: com.xwiki.licensing.internal.upgrades.LicensedExtensionUpgradeJob

The issue seems to be reproducing only if the respective Pro app is the first one installed on a XWiki instance.