Upon upgrading a dnn 9.3 to 9.8 an unexpected issue seems to have turned up on a consistent basis. Anytime some content manager tries to add a module the floating icon never turns up and remains invisible until Personabar > host> empty cache has been clicked.
The moment the new module is added, these messages turn up in the developer bar console tab:
Uncaught TypeError: Cannot read property 'options' of undefined
at dnn.dnnModuleDialog.apply (js:272)
at handleNewModuleFromCookie (js:377)
The attached screen prints are related to the above lines, 272 and 377.
What makes this error difficult is the fact that it only occurs when the concerned page has this setting: Display in menu = true.
If Display in menu = false then this problem disappears.
In case of adding a new tab/page and deploying the same ascx template is in the above example it will work without errors.
Since the website contains a lot of pages the problem with the js dnn moduleManager represents quite a hassle.
Anyone with similar experiences? And thanks for your attention.
You might want to take a look at the logs in portals/_default/logs.
For debugging, you might increate the logging level.
I have had a similar issue and it was also related to HTML errors in the content of the placed module.
I would try uisng an HTML validator on the page after you cleared the Cache to see if that might be the case.
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