Next time this happens, check to see what is shown in the line that has the photographer's name. If it looks like this,
Image # 16373487 | Photographer: Tanya | null (, null)
Then it will not be able to save, as the cemetery itself has no GPS definition and the record can not be saved to a null designation. If that is the case, and it often occurs in these Language Unknown groups, then all you can do is copy and paste the URL and report it to BG support, so they can remove it from the sort or correct the location. Nothing else you can do with it, so just SKIP any that have the null/null in that line.
And, even if that is not the issue, the next time this happens, you should copy the URL and send it to BG support with an explanation of the issue. . They can't fix what they don't know about.
Hope this helps, DS