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I am creating a 1 page mashup with 10 IFrames.
Each IFrame URL is set as retrieved from the DEV Hub single configurator.
When page opened in IE browser, only about 5 IFrames managed to load while the other 5 remains blank. The browser console reported following error
TypeError: Unable to get property 'then' of undefined or null reference
However when the same page is opened in Chrome, all the 10 IFrames are loaded without error.
I am also unable to find any Qlik articles that indicate IE limitations.
Any idea what can be the issue? Appreciate you help, thanks
Hi, I have tried loading of the iframes programmatically by batches (using setTimeout) and it does not seem to help.
Any ideas to debug/try appreciated.
I had the same error and I added &opt=noanimate to the end of each URL in the iframe and it seemed to fix it.
update: this worked in Chrome but the error is still present in Safari.
IE has a restriction in the number of web sockets you are allowed to open, so this would not work. Make a mashup instead and load it in one iframe.