@jeremy-moore1985 – I’m experiencing a “similar-but-different” issue on the latest release (v5.7.10). What’s happening for me is that, rather than the entire form disappearing, the select2 dropdown just reverts to blank when I make a selection. No javascript errors or anything.
For me, the fix (for now, anyway) is to replace the plugin with the last known “good” version:
https://downloads.wordpress.org/plugin/advanced-custom-fields.5.7.3.zip
More info: I’ve done some regression testing, and find that the error disappears if I revert to v5.7.3. 5.7.4, 5.7.5 and 5.7.6 all exhibit the same error. I noticed in the change log that 5.7.4 introduced some improvements in AJAX handling, which may be causing the incompatibility.