Text editor looks different

I’ve managed to restore the TinyMCE text editor to its former state, with all the features now available. I commented out a few lines of code in my child theme’s functions.php that deferred parsing of JS. It’s done the trick although I don’t fully appreciate why. Next up I need to work through a couple of errors showing up in the console, also related to TinyMCE that read:

Uncaught TypeError: Cannot read property ‘body’ of undefined… tinymce.min.js?ver=4401-20160726:11

Hi Rikard
Thank you for getting in touch and I’m pleased to report back that I’ve managed to sort the issues. The editor problems were essentially caused by some page optimization code I had inserted a while back in the functions.php. Namely I was stripping the version from scripts and stylesheets. I added a simple function (reproduced below) that is widely promoted on the internet to “remove query strings from static resources” but in my case, removing the versions from all js and css files caused a conflict with the TinyMCE editor and raised some errors/exceptions. I also have ‘expires header’ settings defined in .htaccess that would have prevented the files being replaced by the browser since they were lacking version numbers. The Editor problem appeared seemingly at random, after I made a minor change to the child theme’s stylesheet css. Why it had a knock-on effect at this time I’m not sure, but hopefully this has fixed the problems others have also seen regarding ‘invisible’ text and unresponsive Visual and Text tabs. It took me a while to debug, but I got there in the end.

Here is the functions that I have commented out:
/* Remove Query Strings from Static Resources Fix */
// stuffs up caching if versions are removed
function _remove_script_version( $src ){
$parts = explode( ‘?ver’, $src );
return $parts[0];
}
add_filter( ‘script_loader_src’, ‘_remove_script_version’, 15, 1 );
add_filter( ‘style_loader_src’, ‘_remove_script_version’, 15, 1 );