Can't select images

[Dennis14e]

When I select an image, I get the following error message (browser console):

Uncaught DOMException: Failed to execute 'setBaseAndExtent' on 'Selection': There is no child at offset 1.
    at Editor.<anonymous> (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:32408:25)
    at Dispatcher.fire (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:24562:24)
    at Editor.fire (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:24881:36)
    at DOMUtils.delegate (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:33321:13)
    at executeHandlers (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:967:36)
    at HTMLHtmlElement.defaultNativeHandler (https://domain.tld/packages/pagekit/tinymce/app/assets/tinymce/tinymce.jquery.min.js:994:5)

Browser: Google Chrome 62.0.3202.94
TinyMCE issue: tinymce/tinymce#3611