Warning: Illegal string offset 'lyrics-only' in php file

If this warning happend to you, an easy fix can be applied.

This happend when uprading to PHP 5.4.
You can change the problematic code to look like this:

$this->lyricsOnly = $cnl_options->lyrics-only;
$this->twoPages = $cnl_options->two-pages;
$this->transpose = 0;
$this->displayEuropean = $cnl_options->european-chords;

This helped me to remove this warning.

https://www.ads-software.com/plugins/chords-and-lyrics/