If the bit-ness of Login Agent and the O/S match, then checking the Windows Event Viewer logs (as described in the "Scenario 2" section of the KB article) for exceptions and validating the service is running/has available permissions would be the next step.
If you need additional assistance with this beyond the available
Troubleshooting Login Agent documentation, I'd suggest opening a Support ticket with us (providing
the necessary information) so we could help investigate further.
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Steve Boggs
Senior Product Support Engineer
Blue Prism
Austin, TX
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