Upgrading to version 1.5.7 Breaks Plugin

If you updated to version 1.5.7 and your collapse-o-matic plugin stopped working. (Your text is permanently expanded and the controls to expand/collapse do not work.) Then try deleting this version and installing version 1.5.6. This worked for me. There seems to be bugs in version 1.5.7. You can download version 1.5.6 here: http://ww.wp.xz.cn/plugins/jquery-collapse-o-matic/developers/

https://ww.wp.xz.cn/plugins/jquery-collapse-o-matic/