After importing one of the effects from the Glitch Constructor pack, you will see a placeholder. The plugin created a subsequence.
Open the folder called AEJuice. Inside it you will find a sequence with the appropriate name.
All you need to do is drag and drop this into the placeholder in Essential Graphics - Edit tabs.
This video may help you: How to replace placeholder AEJuice Pack Manager Premiere Pro Glitch Constructor - YouTube
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