Generate a nonce per request, for example:
MTQ2MDg0NTg0NiwyMzI2NTkyMTA2
Include the nonce in your strict CSP:
Content-Security-Policy: script-src 'nonce-MTQ2MDg0NTg0NiwyMzI2NTkyMTA2'
Add the nonce attribute to your AddToAny <script> tag like so:
<script async nonce="MTQ2MDg0NTg0NiwyMzI2NTkyMTA2" src="https://static.addtoany.com/menu/page.js"></script>