Updating...
I uninstall the package sapsso.msi from the client machine, and reinstall the sap secure login client.
Still receiving a error, but now is comprehensible.
Note that the @IT... is not showing anymore.
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SAP GUI for Windows 730
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GSS-API(maj): Miscellaneous failure
GSS-API(min): A2210223:Server does not trust my certificate path
target="p:CN=ET1, OU=IT"