Error: exec proxy not found for :: FileOpener2 :: open - Cordova Javascript

Question

I've tried so many methods to open my document file (pdf, xls, docx) and one method is using cordova-plugin-file-opener2 I've already tried adding the plugin where the link should be in github, but it still doesn't work. When I tried using it, It shows this error:

Error: exec proxy not found for :: FileOpener2 :: open
Error status: undefined - Error message: undefined

Am I missing something?

P.S. I've already tried cordova-plugin-file and cordova-plugin-file-transfer but still doesn't work. And I'm confident that the FileOpener2 is much more convenient than the other plugins to open a file.

Anyway, here's my code. I hope someone can help. I've been stuck for like 1 week now.

cordova.plugins.fileOpener2.open(
                filePath,
                'application/pdf',
                {
                    error : function(e) {
                        console.log(filePath);
                        console.log('Error status: ' + e.status + ' - Error message: ' + e.meesage);
                    },
                    success : function() {
                        console.log('file opened successfully');
                    }
                }
            );