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some extensions stopped working in the June version of Qlik Sense.
I would like to know where I can find documentation to try to adjust the extensions for them to work again.
Do you know which libraries and functions have changed?
You will have to contact the people who made the extensions. They might be made from totally different individuals and they make their separate documentation (or not) along with where you can get the extension from - often that is Github.
As per people approach on different extensions, they tried to update those extensions. .
Check for the updated extensions and replace.