Can not save Accordion CK modules in Joomla 3.6.5

I noticed this today - upgraded the site yesterday to 3.6.5. The Accordion Menu CK version is 2.1.2. No changes to existing Accordion CK modules can be made - it is not saving anything and the module appears locked after saving. I can not make new modules of this type. Other modules work normally, they can be edited and saved and I can make new modules. Can this be a PHP incompatibility problem - I see now that this server is running PHP 5.5.30...?

Hi
clear your browser cache and tell me if it works
CEd

I already tried that, repeated it now, and it does not help!

ok please contact me by email with an admin access to check this

I have the same Problem.
Each time when I try to change i.e. the color of the Accordeon Menu CK in the
'style customizer', all looks good in the backend.
I stored all, but the result of the color changings of the Accordeon Menu CK are never seen in the frontend.
The color of the Accordeo Menu CK is allways 'grey'.
This is not a problem of caching. To bee sur each time I do any changes in the 'style customizer' I change the logoheader of the website too.
The logoheader changes, but not the color of the Accordeon Menu CK.
You can see the website in the development state under ' www.zellnet.de '.

Hi
in the styles options of the module, please check that you have set it to use the customizer
CEd