Help with R package stringdist

We need to calculate the Levenshtein distance with the R package stringdist. However, we have the problem that we do not get a result, but a + appears in the console after entering the command. We have already looked to see if we have forgotten a bracket or something similar, but this is not the case. If we calculate each sentence separately, the calculation works. However, if we add the whole text to the command, the + appears in the console.
We require help to get the command to work.