Exists() and getSymbols() can't find symbol listed in yahoo

For some reason, even though PRIO3F.SA is listed on yahoo(and also other symbols aside from this one specifically), when I do exists() it simply doesn't find anything. This is for a school project and quite a few symbols can't be found with this method. Is quantmod (or maybe yahoo finance) not my best place to go to?

I've tried multiple different symbol variations and still failing.

> exists("PRIO3F.SA")
[1] FALSE
> exists("PRIO3.SA")
[1] FALSE
> exists("PRIO3F")
[1] FALSE
> exists("PRIO3")
[1] FALSE

If by any chance I try to use getSymbols() instead, this is what greets me:

> getSymbols("PRIO3F.SA", src = "yahoo", auto.assign = FALSE)
Error in getSymbols.yahoo(Symbols = "PRIO3F.SA", env = <environment>,  : 
  Unable to import “PRIO3F.SA”.
attempt to set an attribute on NULL

Solution

Yahoo does not provide historical daily data for every ticker symbol. That's the problem in this case.