Errors from helper.php in server log

Hi! I've encountered a problem in our servers log that says:

PHP Warning: in_array() expects parameter 2 to be array, null given in modules/mod_accordeonck/helper.php on line 170

The site produces this error hundreds of time which makes our log files enormous. Now, we can not just kill this module, a complete sites lays on it, so I need a solution for this if possible.

The lines / line nr 170 mentioned:


The $path :


Almost forgot to mention. According to the error log, this started to occur after the core update Joomla 3.5 -> 3.6.2

Thank you in advance!

Hi
No problem, we will find a solution
Please tell me which version of the menu accordeon you are using
CEd

Hello ced1870!

Sure thing! Our Joomla says it runs the version 2.0.19, the date is October 2011, which is the same version number I found on this site except the date on the second is February 2016. Does it has some updates although the version number stayed the same?

the latest is 2.0.20, you can try to update and tell me

Hello! Thanks, we will definitely try it. However I only found this version on the official website: mod_accordeonck_2.0.19_j30.zip. No 2.0.20 one : (

please try this one attached and tell me if it fixes your problem
dl.dropboxusercontent.com/u/8539690/mod_...eonck_2.0.21_j30.zip