Dreamweaver RegEx Invalid Quantifier

I am using the following search string in Adobe Dreamweaver 19.2 Win 7.

=(?<!”)(d+)(?!”) The Equals sign is part of the search string.

Searching text “table cellspacing=0 border=0 cellpadding=2 width=312”

I do not recieve the error if I simply select replace. Adobe makes the appropriate changes with no error. The error only occurs if I click replace all.

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The Dreamweaver error message box strips off the first 2 characters of the search string . Could this be some indication of the Quantifier error?
Ive ran the search string through the regex 101 website. The search string passes no errors.
I’ve been searching on google and stackoverflow,tried many different combinations of the search string.
Same error in Dreamweaver 21.4 on Win 10

My replace string is “$1”