The add-on installed, but when I tried to click it to save something to a Pin board, nothing happens.
EDIT: The page was https://twentytwowords.com/these-teens-revealed-how-they-actually-want-to-be-parented-and-our-eyes-have-been-seriously-opened/?utm_content=buffera5c1c&utm_medium=social&utm_source=facebook&utm_campaign=bpm&fbclid=IwAR0Mcv_DV7K-0oYSyuh34Ai1g_-JxZqlKCqgEwnR73m_qfaej-nbkLyhZKQ
That's not good. Can you please share what page you were trying to save? Also, can you please share the extension version number? Should be at least 4.0.75.
EDIT: This page works for me but only when I wait for it to load completely. Even then it takes a really long time between when I click the icon and the grid of images that can be saved to Pinterest comes up. When I look at it with a Web inspector I see that there are quite a few network requests and warnings in the console, which can interfere with the extension logic.
I know this isn't a great answer, but in cases like these it's usually best to use the hovering Save button. Sorry about that; if this is your page I will be happy to chat more about what may be going on.