Not displayed in Google Chrome

I have the following problem.
I have integrated a dashboard as ifram in Iobroker Vis, the following message

has been coming since yesterday, but only in Google Chrome. In Microsoft Edge and Firefox, this still works without problems.
Since Chrome is my default browser, it would be great if I could get it running again.
Does anyone have any idea why this might be?

I have been getting the same problem as well.