Well, looking at the log files these appear to be the most serious lines (SCHWERWIEGEND means ERROR, correct?)
02-Nov-2017 10:33:22.158 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults ERROR ... null: Cannot validate jar: null
02-Nov-2017 10:33:22.161 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults Invalid AppModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
02-Nov-2017 10:33:22.165 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults FAIL ... CotU_6: Missing required "name" attribute on class-level @EJB usage
02-Nov-2017 10:33:22.169 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults FAIL ... CotU_6: Missing required "beanInterface" attribute on class-level @EJB usage
02-Nov-2017 10:33:22.173 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults Invalid EjbModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
02-Nov-2017 10:33:22.177 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults FAIL ... CotU_6: Missing required "name" attribute on class-level @EJB usage
02-Nov-2017 10:33:22.181 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults FAIL ... CotU_6: Missing required "beanInterface" attribute on class-level @EJB usage
02-Nov-2017 10:33:22.185 SCHWERWIEGEND [main] org.apache.openejb.config.ReportValidationResults.logResults Invalid WebModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
Or, cutting out all of the administrative stuff at the left:
ERROR ... null: Cannot validate jar: null
Invalid AppModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
FAIL ... CotU_6: Missing required "name" attribute on class-level @EJB usage
FAIL ... CotU_6: Missing required "beanInterface" attribute on class-level @EJB usage
Invalid EjbModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
FAIL ... CotU_6: Missing required "name" attribute on class-level @EJB usage
FAIL ... CotU_6: Missing required "beanInterface" attribute on class-level @EJB usage
Invalid WebModule(name=CotU_6, path=C:\Program Files\Apache\apache-tomee-plus-7.0.3\webapps\CotU_6)
I can't tell what that "null jar" is all about, but the other messages are referring to an @EJB annotation somewhere. Perhaps tracking that down and fixing it might move your project forward?