Blackbaud NetCommunity 7.1 contains an update to jQuery 1.12. This version of jQuery has more strict syntax guidelines. As a result, if the custom slideshow uses a older version of jQuery uploaded through the Files library, the syntax may not be compatible. When viewing the page with the slideshow, you may see the following in the browser developer console:

Uncaught Error: Syntax error, unrecognized expression: a[href^=#]

The syntax will have to be corrected with an updated file that is compatible with jQuery 1.12. Support analysts will be able to assist with updating this file. Please contact support and reference this article.