Getting 404 error on backend when editing translations

Current Config:
Joomla 3.9.1 (was also doing it with 3.8x)
Events Booking 3.8.4

On the backend, when I try to edit a translation and hit save, I get a 404 error. I've tried logging out and logging back in.

Any idea why this is happening?

Thanks

Hello

Look like there are too many language items/inputs on the page and your hosting provider blocking the request

In this case, maybe you should edit the language file directly to change the value? Look at language/en-GB/en-GB.com_eventbooking.ini, find and change any language items you want

Regards,

Tuan