New social media sites and widget problems

Hi, I decided to try out this version of Ultimate Social Media (I have been using the earlier version), and I encountered two problems. I received an error when I tried to add another social media site, Academia.edu (actually I have this problem with the earlier version too). Also, the widget selection section for my theme disappeared completely (I’m using the “First” theme). Thanks!

https://www.ads-software.com/plugins/ultimate-social-media-plus/