You can try using checksts script - https://knowledge.broadcom.com/external/article/318968/checking-expiration-of-sts-certificate-o.html and then fixsts script - https://knowledge.broadcom.com/external/article/316619.
P.S. Since 6.0 is out of support since a long time, this might work or not work.
Although I am a VMware employee I contribute to VMware Communities voluntarily (i.e. not in any official capacity)
Please mark my comment as Correct Answer or assign Kudos if my answer was helpful to you, Thank you.