https://bugs.winehq.org/show_bug.cgi?id=54152
--- Comment #1 from Gabriel Ivăncescu gabrielopcode@gmail.com --- That IHTMLStorage_key is from local storage, and the mshtml code never returns E_FAIL directly without using another API (it expects E_INVALIDARG because the index is negative, i.e. out of range). The failure is probably coming from msxml or the opening of the file itself. open_document returns E_FAIL if IXMLDOMDocument_load returns S_FALSE or doesn't succeed loading, for example, so it's probably from there, unless it's a propagated error.
If it's a memory corruption it's unlikely I can find the cause unfortunately, especially since I never saw it locally / can't reproduce. Not sure what can cause the timeout, but some of the tests are reliant a bit on local files and such, which might be prone to flaky errors?