Resolved!
Found it in product-archive on theme files (i was originally looking in product-archive in woocommerce files!)
I already tried what was recommended in the FAQ.
The error that shows up from the error console is:
Error: D.mask.set is not a function
Source file: http://sincityrentals.net/wp-content/plugins/booking.premium.plus.2.8/include/js/jquery.meio.mask.min.js
Line: 7
That’s the only problem it is showing, but maybe someone could check my website and see if anything else may be preventing the calendar from appearing.
Thanks