The error indicates, that there is no GPS fix / location information available, which is needed for the POI samples. Ideally you have a close look at the different POI / geoAR samples in our sample app and work together with the technical documentation. We don't offer single samples - only the sample app which includes all the different ones, which is included in the SDK download package.
Also there are several other posts in the forum, dealing with this question and possible solutions. Please also check these:
Thx and greetings