ETA:
I’ve just found a similar issue with link fields. I get the following when I try to select a link
Uncaught ReferenceError: wpLink is not defined
at acf.Model.open (acf-input.min.js?ver=5.7.3:2)
at i.onClickEdit (acf-input.min.js?ver=5.7.3:2)
at i.<anonymous> (acf-input.min.js?ver=5.7.3:1)
at HTMLAnchorElement.d (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,moxiejs,plupload&ver=5.0-alpha-43578:2)
at HTMLDivElement.dispatch (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,moxiejs,plupload&ver=5.0-alpha-43578:3)
at HTMLDivElement.r.handle (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,moxiejs,plupload&ver=5.0-alpha-43578:3)
Is this an issue with any ACF fields that open a modal?