Opatch can't load main class in oui folder

hi
I'm patching an install of 19c with patch 36219938 on windows 64-bit
I've upgraded opatch to p6880880 by replacing the opatch folder and unzipping into a new opatch folder

I've set env as suggested

SET PATH = %ORACLE_HOME%\perl\bin;%ORACLE_HOME%\jdk\bin;%PATH%
SET PERL5LIB =

When I call
D:\Build\temp\36219938>PATH_TO_OPATCH\opatch -apply I get the error

Error: Could not find or load main class D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\emCfg.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\OraInstaller.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\OraPrereq.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\share.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\orai18n-mapping.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\xmlparserv2.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\emCfg.jar; D:\app\pulse\product\19.3.0\dbhome_1\oui\lib\ojmisc.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\jlib\opatch.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\automation.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\apache-commons\commons-cli-1.0.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\jlib\opatchsdk.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\jaxb\activation.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\jaxb\jaxb-api.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\jaxb\jaxb-impl.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\jaxb\jsr173_1.0_api.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\OsysModel.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\osysmodel-utils.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\CRSProductDriver.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\jlib\oracle.opatch.classpath.jar;D:\app\pulse\product\19.3.0\dbhome_1\OPatch\oplan\jlib\oracle.oplan.classpath.jar;.;.