Generate a nonce per request, for example:
MzU5MTY2ODcxNiwyNjA4MDA5MTk4
Include the nonce in your strict CSP:
Content-Security-Policy: script-src 'nonce-MzU5MTY2ODcxNiwyNjA4MDA5MTk4'
Add the nonce attribute to your AddToAny <script> tag like so:
<script async nonce="MzU5MTY2ODcxNiwyNjA4MDA5MTk4" src="https://static.addtoany.com/menu/page.js"></script>