Well, the linked document Lilibiri provided, contains 2 errors which are not present in the published Cp12 index.html of my project. I'm not sure what actually causes those errors but fact is, that the project.js in line 5317 and column 19 throws an Uncaught SyntaxError: ' ' string literal contains an unescaped line break. "This can occur if a line break, i.e., a new line character (`\n`) or carriage return character (`\r`), is added to the string without being properly escaped." (quoted from here.) The next error: Uncaught TypeError: can't access property "CPProjInit", window.cp is undefined is very likely a consequence of the previous error. This alle leads to the problem that the <div>: <div id="app" style="width: 100%; height: 100%"></div> is empty, no contents whatsoever, which in turn doesn't surprise that "the screen remains blank". I attach screenshots of the Javascript console and the page source inspector. Please note that the left side represents Lilibiri's blank document, the right side my fully visible document.
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