Addthis sharing box, 414 Request-URI Too Large

[leased]

I have lot of pages that are not sharable, most of them are configurable products like this page: https://particulier.computer.nl/audio-en-video-apparatuur-op-afbetaling/samsung-curved-uhd-led-tv-6-...

I want my clients to be able to share the page, but than they receive a message that the requested URI is too large, i have some costum (basic html) code in the description, this might be the problem, how can i solve this?