Case you obtained this message in game:

"Error creating Batman props, check the file BatmanProps.txt..."

you had issues with the added props package, your game failed to create the props.
To make sure it isn't a first load issue, press the Insert button on your keyboard to reload scripts
and then try to equip a suit again to see if the message still appears on screen bottom.

Case the error persists you can try installing the replace packages that will
replace some game props with the Batman props, close the game and install the
package "2.1 - Props (replace, case add props fail).oiv" choosing Mods folder.