Illegal string offset 'elevation'

I start using php 5.4 to solve some problems with plugins, but now after I start using php 5.4 I get the message below on top of every page with a map from Google.

Warning: Illegal string offset ‘elevation’ in /home/robdeen52/domains/journey2holland.com/public_html/wp-content/plugins/google-maps-gpx-viewer/php/kml_layer.php on line 22

I red on internet that KML needs an absolute path, but every KML-file has an absolute path.

Does anyone know how to solve this problem?