Answered
cannot use Adobe Stock templates
I get an error message about plug ins.

I am using an older version of InDesign.
I get an error message about plug ins.

I am using an older version of InDesign.
You didn't say what version of InDesign you're using. If the dialog says its an INDT file, it's a template created in a later version of InDesign. You need to update.
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