ASSERTION FAILED: thisDocumentView != nil (/WebKit/WebKit/WebCoreSupport/WebFrameLoaderClient.mm:209 forceLayoutForNonHTML)
I can't reproduce the assertion but I have a missing plugin alert : The page “Israel Police Service Portal” has content of an unspecified MIME type. Because you don’t have a plug-in installed for this MIME type, this content can’t be displayed.
I can no longer reproduce the bug.