AJAX Event not working in Production

Hi, I have a peculiar issue. I have a form application and I have 2 select fields. Month and Year.

The Year is kept as disabled for Insert and Update

If a Month is selected and I have a month_onchange Ajax event inside that I am checking for some rules and changing the year according to the month selection.

This is working perfectly fine in my development environment, however in production when i change the month the year is not getting changed. However I see that a progress bar flashes the screen which I am thinking that Ajax is getting executed (I could be wrong).

I was thinking the reason why it is not working could be due to the Libraries and tried replacing most of the libraries but still the same issue is there.

Any suggestions will be of great help. Thank you for your time in advance.

if you put the year in the label leaving the field active, you can check if it is working in production,

No, I have already tired that and it did not work :frowning: