Button - Formula Url

Hello,

When I click the button "Submit all Sales offices" it is giving me this prompt tbat is showing in the picture 

this is the formula - url code

var text markCompleted = URLRoot() & "db/" & Dbid() & "?a=API_EditRecord" & "&apptoken=MyAppToken"
 & "&rid=" & URLEncode([Record ID#]) & "&_fid_921=1" & "&rdr="&URLEncode(URLRoot() & "db/" & Dbid() & "?a=er&dfid=34&rid=" & ToText([Record ID#]) & "&page=16"); 

$markCompleted


this form is on edit mode, 

The button will be use to submit all the sales office that are selected(Checkbox) in the embedded report in the form 34 where this button lives. after the selection the use will click the button and submit all the sales selected office. the next step after that is product page where will do a similar process