And what about the MaxButtons insert button to insert one somewhere in a text/on my website. I can use the shortcode, but the buttons to insert do not work.
Okay, good to know :).
So yes it did install a new plugin, but deleted it as well in order to check if that plugin causes the problem.
The class is correct since it has been working before. That is why I thought that the button would be the problem. But it is seemingly not the case. Hmm..
I do not understand what you mean with the last sentence.
I found out that the plugin doesn’t work anyway. It does the trick, as in I can create a button. But as soon as I want to insert the button somewhere all MaxButtons insert button do not work. It seems that there is no connection to the plugin? While it did work before, for a few weeks. How come?