Getting an error - We were unable to locate a field, but it is not a dropdown, checkb

[alrioart]

I'm getting this error when trying to use smart fill to populate the options list.

We were unable to locate a field, but it is not a dropdown, checkbox or radio group.

The field is there. I'm typing in the correct name. It *is* a select box dropdown.

I'm trying to populate this data (to start) :
CCExpMonth
Form URL: https://gawp.org/securebids.php

and the section of that form looks like this:

<select name="CCExpMonth" size="1" class="selectbox salary" style="width:100px;">
<option value="" >--Select--</option>
<option value="01" <?php if (@$fields["CCExpMonth"] == "01") echo "selected"; ?>>01 - January</option>
<option value="02" <?php if (@$fields["CCExpMonth"] == "02") echo "selected"; ?>>02 - February</option>
<option value="03" <?php if (@$fields["CCExpMonth"] == "03") echo "selected"; ?>>03 - March</option>
<option value="04" <?php if (@$fields["CCExpMonth"] == "04") echo "selected"; ?>>04 - April</option>
<option value="05" <?php if (@$fields["CCExpMonth"] == "05") echo "selected"; ?>>05 - May</option>
<option value="06" <?php if (@$fields["CCExpMonth"] == "06") echo "selected"; ?>>06 - June</option>
<option value="07" <?php if (@$fields["CCExpMonth"] == "07") echo "selected"; ?>>07 - July</option>
<option value="08" <?php if (@$fields["CCExpMonth"] == "08") echo "selected"; ?>>08 - August</option>
<option value="09" <?php if (@$fields["CCExpMonth"] == "09") echo "selected"; ?>>09 - September</option>
<option value="10" <?php if (@$fields["CCExpMonth"] == "10") echo "selected"; ?>>10 - October</option>
<option value="11" <?php if (@$fields["CCExpMonth"] == "11") echo "selected"; ?>>11 - November</option>
<option value="12" <?php if (@$fields["CCExpMonth"] == "12") echo "selected"; ?>>12 - December</option>
</select>


Can you help?
Using 2.2.0
Other forms are working on on the same server.

Terry

[alrioart]

I updated to 2.2.5 today and still have this same problem. :/