It seems that after recent upgrade MikTeX move documentations of many standard packages for tables to some new folder with yet unknown name. Do anyone know name of this folder or how to find them?
In the recent upgrade of the MikTeX bundle to version 20.12 was changed name of folder
tools where were collected packages among others for tables styles (
latex-tools. Folder for styles is in
.../MikTeX/tex/latex and for its documentation in
tools still exist, bit they are empty.
Thank you very much to all, who helped me to find this changes.