'The problem with the launch of the epiR package

please could you help me to solve the problem with the launch of the epiR package? I installed this package from CRAN via RStudio. The installation went fine, but when I try to run this package, I get the following message:

> library(epiR) Download required package: survival Error: Failed to load package or namespace for 'epiR': .onLoad failed in loadNamespace() for 'units', details: call: ud_init(path) error: no database found!

Tell me, please: what is the problem and how to solve it? Other packages (including those installed today) do not have this problem.

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