In the custom JvValidators.pas in Common\3rd Party\Jedi, the last 'uses' is JVCL5Utils.
In JVCL, the correct corresponding library is JvJVCLUtils
Replacing JVCL5Utils with JvJVCLUtils allows it to build, using the correct include. '
Checked with HomerSP, and they have JvJVCLUtils in place of JVCL5Utils.
This only affects those with JVCL 3.39 installed, where as the releases are currently built against 3.36. If everything works against 3.39 it might be worth upgrading.
This only seems to happen in 3.39, and not 3.36 (Checked with James).