ERROR - Invalid SQL*plus Version 8.0.6.0.0

When executing this script "PO_APPR_BUG.sql" ,it is failing with below error.

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        Issue
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ERROR - Invalid SQL*plus Version 8.0.6.0.0
ACTION - On databases using the UTF8 NLS characterset this test should not be
run using this
. SQL*plus Version. Please rerun this test using version 8.1.X of
SQL*plus or higher.
. Type Ctrl-C to exit the test.
PO_APPR_BUG.zip

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Solution:
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Login to database as Oracle user and run that script,i think you tried executing it with applmgr user.