Please help R error message "masked from 'package:utils':combn"

Hi

The message occurred from R, when I was selected of "optimization > block
diagonal Fhiser matrix" and used the attached file on PFIM.

Could you please advise me about the following message?

*****************************
Loading required pakage: combinat
Attaching package:'combinat'
The following object(s) are masked from 'package:utils':combn
*****************************

Kind regards,
Fumie