This should just be a warning, not an error, so it shouldn't prevent you from building the project.
You can easily fix it by removing the comparison check at that line, since it's not needed anymore. It will also be fixed in the next release.
assets/wikitude/samples/scripts/inputplugin/customcamerarenderer.cs(81,129): warning cs0618: `unityengine.screenorientation.unknown' is obsolete: `enum member unknown has been deprecated.'
this error comes when i import wikitude for unity please help me to fix this i have a project for my college i cant complete this due to this.pls help me