"The 'Description' attribute is invalid - The value '
Basically, this error says that your description is too long.
Through trial and error, I've found out that the max allowable length of the Windows 8 app description in WMAppManifest.xml is 256 characters. So, in order to fix this problem, all you have to do open "WMAppManifest.xml", which can be found in the Properties folder of your app's project. Then, edit your description so that it is not as long. I used Notepad++ to count the number of characters in the description.
I spent a few minutes looking for the official documentation for this file, but didn't find it. I found many official resources for Windows 8 that was close, but weren't for the exact file WMAppManifest.xml. Here's one of the links that is something that I'm looking for <link>.
If you know where the official page for this documentation of max length of 256 characters for the description, then please let me know. This bug still hasn't been reported to the developers of Construct 2 yet, because I think there will be other areas around this spot that also has bugs, and I would like to report them all in one go. This will make things much easier for the developer also. And, it's always good to source fixes.
|A picture of the error message.|
~ Danial Goodwin ~