Profile: BD

Problem: All the maps I created with Toolset Maps and Views have disappeared after I updated to WordPress 4.9.1

Solution: There is a blocking JavaScript error related to the custom theme in use:

wp-mediaelement.min.js?ver=4.9.1:1 Uncaught TypeError: b(...).not(...).filter(...).mediaelementplayer is not a function
    at HTMLDocument.a (wp-mediaelement.min.js?ver=4.9.1:1)
    at i (jquery.min.js:2)
    at Object.fireWith [as resolveWith] (jquery.min.js:2)
    at Function.ready (jquery.min.js:2)
    at HTMLDocument.J (jquery.min.js:2)

The same maps tested in a default theme like Twenty Seventeen function correctly, so it seems there is a conflict in the custom theme that must be resolved.