tq_mutate with periodReturn not working past a certain date ("Incompatible structures")

[tvqt]

Hello,

I don't know if this is the right place to raise this, but I was trying to use tq_mutate for a uni assignment, and I found that it has an issue with the stock I was looking at.

rio_stock_prices <- tq_get("RIO.AX", get = "stock.prices", from = "2004-12-25") rio_stock_prices %>% tq_mutate(select = open, mutate_fun = periodReturn, period = "daily")
This returns a result successfully. However, go from one day earlier, and the second command fails:
rio_stock_prices <- tq_get("RIO.AX", get = "stock.prices", from = "2004-12-24") rio_stock_prices %>% tq_mutate(select = open, mutate_fun = periodReturn, period = "daily")

Error in merge_two_tibbles(tib1 = data, tib2 = ret, mutate_fun) :
Could not join. Incompatible structures.
In addition: Warning messages:
1: In to_period(xx, period = on.opts[[period]], ...) :
missing values removed from data
2: type_convert() only converts columns of type 'character'.

• df has no columns of type 'character'

[tvqt]

if it helps, this is the part of the data:

I'm guessing it's got something to do with the NAs in the data?

[tvqt]

update: removing the NAs makes it run-- maybe some kind of flag can be added to the function, so others can avoid this kind of error ?