We recently had a look at a similar issue regarding the linking of the XML file to a couple of modules that went missing.
I have been working on other modules and a similar message is shown inside with an error message "Module XML data not available" inside. How can I get this working properly again.
I have attached some files to give you a clue what I mean.
image1: Looks at a module I was working on that no longer works and shows no TinyMCE Editor in the custom module
image2: Another module I was working on that no longer works and shows the above mentioned error message
image3: Looking at the list of all the modules affected. I am using some of them on this site, but have an XML file problem.
I look forward to hearing from you.
Miguel