Adobe Acrobat Reader DC will not let me type into a fillable PDF form...anymore -- had this problem a few times

 Adobe Acrobat Reader DC will not let me type into a fillable PDF form...anymore

Can't click anything, just makes a weird sound

https://community.adobe.com/t5/acrobat/adobe-acrobat-reader-dc-will-not-let-me-type-into-a-fillable-pdf-form-anymore/td-p/9692217?page=1

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have this problem a few times

have to find the answer