Least Cost Path Error

I am working in QGIS and have been wanting to do a simple Least Cost Path Analysis using the SAGA tool. I have created a Slope raster for it, as well as an Accumulated Cost Surface. I have two points which I have imported from Google Earth and transformed into two separate point layers. I have tried numerous times to run the plug in, but I keep getting the same error:

ERROR: The start-point layer contains no legal point.

I tried to re import the points, change the CRS, researching on the internet and watching tutorials, but nothing seem to work or to give a reason for this issue. Is there a way to fix this?