Describe the bug
Running with UT_COVERAGE_HTML_REPORTER reporter from utplsql-cli throws oracle error.
The normal UT_DOCUMENTATION_REPORTER runs all testcases successfully.

Provide version info
12.2.0.1.0
12.2.0

PL/SQL procedure successfully completed.

UT_VERSION
v3.1.10.3349

BANNER CON_ID

Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production 0
PL/SQL Release 12.2.0.1.0 - Production 0
CORE 12.2.0.1.0 Production 0
TNS for Linux: Version 12.2.0.1.0 - Production 0
NLSRTL Version 12.2.0.1.0 - Production 0

PARAMETER VALUE

NLS_LANGUAGE ENGLISH
NLS_TERRITORY AUSTRIA
NLS_CURRENCY ¿
NLS_ISO_CURRENCY AUSTRIA
NLS_NUMERIC_CHARACTERS ,.
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD.MM.RR HH24:MI:SS
NLS_DATE_LANGUAGE ENGLISH
NLS_SORT BINARY
NLS_TIME_FORMAT HH24:MI:SSXFF
NLS_TIMESTAMP_FORMAT DD.MM.RR HH24:MI:SSXFF

PARAMETER VALUE

NLS_TIME_TZ_FORMAT HH24:MI:SSXFF TZR
NLS_TIMESTAMP_TZ_FORMAT DD.MM.RR HH24:MI:SSXFF TZR
NLS_DUAL_CURRENCY ¿
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE

17 rows selected.

PORT_STRING
x86_64/Linux 2.4.xx

Information about client software
utplsql-cli

$ ./utplsql info utPLSQL-cli 3.1.8-SNAPSHOT.local utPLSQL-java-api 3.1.8.546

Additional context
2020-09-04 11:57:08 [main] INFO org.utplsql.cli.RunAction -
############################ utPLSQL cli #############################
utPLSQL-cli 3.1.8-SNAPSHOT.local #
utPLSQL-java-api 3.1.8.546 #
Java-Version: 1.8.0_201 #
ORACLE_HOME: ############################## #
NLS_LANG: AMERICAN_AMERICA.UTF8 #
#
Thanks for testing! #
#
######################################################################
2020-09-04 11:57:08 [main] INFO org.utplsql.cli.RunAction -
2020-09-04 11:57:09 [main] DEBUG o.u.c.d.TestedDataSourceProvider - NLS settings: BEGIN
EXECUTE IMMEDIATE q'[ALTER SESSION SET NLS_LANGUAGE='AMERICAN']';
EXECUTE IMMEDIATE q'[ALTER SESSION SET NLS_TERRITORY='AMERICA']';
END;
2020-09-04 11:57:09 [main] INFO o.u.c.d.TestedDataSourceProvider - Use connection string jdbc:oracle:thin:/@***
2020-09-04 11:57:10 [main] INFO org.utplsql.cli.RunAction - Successfully connected to database. UtPLSQL core: v3.1.10.3349
2020-09-04 11:57:10 [main] INFO org.utplsql.cli.RunAction - Oracle-Version: 12.2.0.1.0
2020-09-04 11:57:10 [main] DEBUG org.utplsql.api.reporter.Reporter - Database-reporter initialized, Type: UT_COVERAGE_HTML_REPORTER, ID: AE7AE470E70F3B7AE0530101007FF44E
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.cli.RunTestRunnerTask - Running tests now.
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.cli.RunTestRunnerTask - --------------------------------------
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - TestRunner initialized
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Running on utPLSQL v3.1.10.3349
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Initializing reporters
2020-09-04 11:57:10 [pool-1-thread-1] INFO org.utplsql.api.TestRunner - Running tests
ORA-08402: error executing PL/SQL code coverage
ORA-06512: at "UT3.UT_RUNNER", line 180
ORA-06512: at "SYS.DBMS_PLSQL_CODE_COVERAGE", line 148
ORA-06512: at "UT3.UT_COVERAGE_HELPER_BLOCK", line 45
ORA-06512: at "UT3.UT_COVERAGE", line 221
ORA-06512: at "UT3.UT_COVERAGE_HTML_REPORTER", line 34
ORA-06512: at "UT3.UT_REPORTER_BASE", line 193
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 70
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 80
ORA-06512: at "UT3.UT_RUN", line 74
ORA-06512: at "UT3.UT_SUITE_ITEM", line 49
ORA-06512: at "UT3.UT_RUNNER", line 172
ORA-06512: at line 1

java.sql.SQLException: ORA-08402: error executing PL/SQL code coverage
ORA-06512: at "UT3.UT_RUNNER", line 180
ORA-06512: at "SYS.DBMS_PLSQL_CODE_COVERAGE", line 148
ORA-06512: at "UT3.UT_COVERAGE_HELPER_BLOCK", line 45
ORA-06512: at "UT3.UT_COVERAGE", line 221
ORA-06512: at "UT3.UT_COVERAGE_HTML_REPORTER", line 34
ORA-06512: at "UT3.UT_REPORTER_BASE", line 193
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 70
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 80
ORA-06512: at "UT3.UT_RUN", line 74
ORA-06512: at "UT3.UT_SUITE_ITEM", line 49
ORA-06512: at "UT3.UT_RUNNER", line 172
ORA-06512: at line 1

    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:509)
    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:461)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1104)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:550)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:268)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:655)
    at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:265)
    at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:86)
    at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:965)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1205)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3666)
    at oracle.jdbc.driver.T4CCallableStatement.executeInternal(T4CCallableStatement.java:1358)
    at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3778)
    at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4251)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1081)
    at org.utplsql.api.testRunner.DynamicTestRunnerStatement.execute(DynamicTestRunnerStatement.java:84)
    at org.utplsql.api.TestRunner.run(TestRunner.java:213)
    at org.utplsql.cli.RunTestRunnerTask.call(RunTestRunnerTask.java:45)
    at org.utplsql.cli.RunTestRunnerTask.call(RunTestRunnerTask.java:24)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Caused by: Error : 8402, Position : 0, Sql = BEGIN ut_runner.run(a_paths => :1 , a_reporters => :2 , a_color_console => (case :3 when 1 then true else false end), a_fail_on_errors => (case :4 when 1 then true else false end), a_client_character_set => :5 , a_random_test_order => (case :6 when 1 then true else false end));END;, OriginalSql = BEGIN ut_runner.run(a_paths => ?, a_reporters => ?, a_color_console => (case ? when 1 then true else false end), a_fail_on_errors => (case ? when 1 then true else false end), a_client_character_set => ?, a_random_test_order => (case ? when 1 then true else false end));END;, Error Msg = ORA-08402: error executing PL/SQL code coverage
ORA-06512: at "UT3.UT_RUNNER", line 180
ORA-06512: at "SYS.DBMS_PLSQL_CODE_COVERAGE", line 148
ORA-06512: at "UT3.UT_COVERAGE_HELPER_BLOCK", line 45
ORA-06512: at "UT3.UT_COVERAGE", line 221
ORA-06512: at "UT3.UT_COVERAGE_HTML_REPORTER", line 34
ORA-06512: at "UT3.UT_REPORTER_BASE", line 193
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 70
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 80
ORA-06512: at "UT3.UT_RUN", line 74
ORA-06512: at "UT3.UT_SUITE_ITEM", line 49
ORA-06512: at "UT3.UT_RUNNER", line 172
ORA-06512: at line 1

    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:513)
    ... 22 more