I've got this issue today.
My dropdowns (lookup tables) no longer work.
If I open the console I find:
POST ....//my_site/ewlookup12.php 410 (Gone)
send @ jquery-1.12.0.min.js:4
ajax @ jquery-1.12.0.min.js:4
ew_UpdateOpt @ ewp12.js:4
u @ ewp12.js:6
Also the quick filter is not working (not poulates the dropdown)
What happened?