I am using RiverGIS plugin in QGIS and facing a problem in Extracting Manning's n values for cross-sections. The error code is as follow: -
Extracting Manning's n values for cross-sections UndefinedFunction('function st_line_interpolate_point(geometry, numeric) does not exist\nLINE 39: ST_Line_Interpolate_Point(inter_xs_dump.geom, 0.0000...\n ^\nHINT: No function matches the given name and argument types. You might need to add explicit type casts.\n') Process aborted!
I am not very expert in in coding, so please help me.