Capitalize First Letter Of Each Word of String In UiPath RPA

Hi Sir,
StrConv(stringValue,VBStrConv.ProperCase) is not working in my system.
I know that some time some code don't work in some machine and we need to import something or do some workaround (i.e., clear cache, restart studio).
Can we provide more information in this regard, please.
Note: Lowercase is working

Besides, I am not finding "Add to collection" activity

why you stopped creating videos on uipath

It helped a lot. Just one question how we can make only first latter capital? Input - deepak and required output is Deepak ..