Generate a nonce per request, for example:
NjI5NTU4NjI4LDc3OTI0MzEyMQ==
Include the nonce in your strict CSP:
Content-Security-Policy: script-src 'nonce-NjI5NTU4NjI4LDc3OTI0MzEyMQ=='
Add the nonce attribute to your AddToAny <script> tag like so:
<script async nonce="NjI5NTU4NjI4LDc3OTI0MzEyMQ==" src="https://static.addtoany.com/menu/page.js"></script>