you can directly open your game file itself (right click) with (opening your game file with) any text software (and see~get_to~copy your entire game~source code), such as with:
notepad, wordpad, notepad++ ( https://notepad-plus-plus.org/ ), apple: text editor, etc
and don't worry about your game file not opening into the GUI~Editor or not playing (don't let the errors scare you!), as it is just an error in the code ~ something that you've done wrong (usually a simple typo~mistake too), which can be fixed up, to be working fine again. We just need to troubleshoot what the issue is that is causing you game file to not work~open~load~etc (initialize).
there's two types of errors~issues~problems:
.1. the type that prevent you from opening up and~or playing a game file (unable to initialize~create~setup your game file by quest.exe into its GUI~Editor mode or play mode).
.2. the type that pops up during actual game play.
I'm not that familiar with the errors' error_codes that well, but maybe in your game code, try removing any of these lines that you see:
(also, maybe you just did a typo of these too ~ you don't have to remove them ~ just fix the typo'ed syntax of them to the below, which could be cause of your issue~problem~error)
<inherit name="editor_room" />
<inherit name="editor_object" />
<inherit name="editor_player" />
and also any code blocks looking something like these:
<type name="editor_room">
// blah code lines
</type>
<type name="editor_object">
// blah code lines
</type>
<type name="editor_player">
// blah code lines
</type>
as these are only for the GUI~Editor, and are suppose to be removed, when you actually play your game... but you still seem to have them, thus it prevents you from playing your game and~or opening up your game file into the editor mode.