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TypeError: Cannot modify readonly property: constructor #537

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@basimons

I have been using htmlUnit on this specific website for a while to test our SAML login flow. A few days ago the test suddenly broke, without any changes from our end. Something probably changed on the website, but it is not working anymore. I was using 2.65.0 and updated to 2.67.0 to see if it fixed it, but unfortunately doesn't seem to do the trick.

A minimally reproducable example:

WebClient webClient = new WebClient(BrowserVersion.BEST_SUPPORTED);
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setJavaScriptEnabled(true);

webClient.getPage("https://dev-43246762.okta.com/home/dev-43246762_blockbaxtest_1/0oa1a0d285rc8xFaS5d7/aln1a0gob9YTeiQMJ5d7");
webClient.waitForBackgroundJavaScript(10000);
HtmlPage okta = (HtmlPage) webClient.getCurrentWindow().getEnclosedPage();
webClient.waitForBackgroundJavaScript(10000);

Hope this is helpful, if not feel free to ask for more information.

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