Hi K2Developer-1,

Were you trying to register an Oracle Service Instance ?

If yes then kindly check out the KB below 

This error usually appears if the ODAC has not yet been installed from

https://help.k2.com/support-services/kbt136653

Should you feel that this post is of use and or an accurate solution to the raised question, I kindly encourage you to mark it as such
using the 'Mark as Solution', 'Kudo' andor ‘Me Too’ options.

Cheers,
Kate

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