i'm working on macOs catalina, extjs 6.0.0 and sencha cmd 6.0.0.202 too..
when i'm running command
Code:
sencha app watch
i'm get error... here is the full error..

Code:
[ERR]
[ERR] BUILD FAILED
[ERR] com.sencha.exceptions.ExProcess: Failed creating background process
[ERR]     at org.apache.tool
[ERR] s.ant.UnknownElement.execute(UnknownElement.java:291)
[ERR]
[ERR] Total time: 8 seconds
[ERR] The following error occurred while executing this line:
/.sencha/app/build-impl.xml:248: The following error occurred while executing this line:
/.sencha/app/watch-impl.xml:61: The following error occurred while executing this line:
/.sencha/app/build-impl.xml:286: The following error occurred while executing this line:
/.sencha/app/slice-impl.xml:7: The following error occurred while executing this line:
/.sencha/app/slice-impl.xml:18: com.sencha.exceptions.ExProcess: Failed creating background process
please help me..