Directory search returning Uncaught Error in console

Two of the member directories that were working flawlessly over the past two years is suddenly not working after the latest 2.6.7 update. When trying to do a search, the icon spinner just spins forever. The browser console reports this error:

Uncaught Error: Template not found: #tmpl-um-member-list-a8f09
    at wp-util.min.js?ver=7508581899b4ea84b9db5b1109b81083:2:371
    at um_build_template (um-members.min.js?ver=2.6.7:1:5795)
    at Object.success (um-members.min.js?ver=2.6.7:1:4917)
    at c (jquery.min.js?ver=3.6.4:2:28447)
    at Object.fireWith [as resolveWith] (jquery.min.js?ver=3.6.4:2:29192)
    at Object.<anonymous> (wp-util.min.js?ver=7508581899b4ea84b9db5b1109b81083:2:1230)
    at c (jquery.min.js?ver=3.6.4:2:28447)
    at Object.fireWith [as resolveWith] (jquery.min.js?ver=3.6.4:2:29192)
    at l (jquery.min.js?ver=3.6.4:2:80176)
    at XMLHttpRequest.<anonymous> (jquery.min.js?ver=3.6.4:2:82630)