the Screenshot of console
What stands out most is the highlighted (bold) part.
Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: Input ''{"1":{"name":"U_Name","dataType":"STRING","value":"'+$Register/UserName+'"},"2":{"name":"U_Pass","dataType":"STRING","value":"'+$Register/Password\n+'"},"3":{"name":"U_Add","dataType":"STRING","value":"'+$Register/Address+'"},"4":{"name":"U_Cont","dataType":"INTEGER","value":"'+$Register/PhoneNumber+'"},"5":{"name":"U_Gender","dataType":"STRING","value":"'+toString($Register/Gender)+'"},"6":{"name":"U_Email","dataType":"STRING","value":"'+$Register/EmailID+'"},"7":{"name":"U_FullName","dataType":"STRING","value":"'+$Register/FullName+'"},"8":{"name":"U_Lat","dataType":"DECIMAL","value":"'+parseDecimal($Register/Latitude)+'"},"9":{"name":"U_Long","dataType":"DECIMAL","value":"'+parseDecimal($Register/Lognitude)+'"}}'' could not be parsed
and a bit further
token recognition error at: '\'
Does not ring a bell to me what the root cause could be, but maybe you can take a look at where the $Register/Password attribute is used and see if you can figure out if something is wrong there.
In my case,
Space added by "Tab" button caused issue.
Also if we copy query from somewhere and it has indentation then also it gives "token recognition error"
So i removed indentation and added space again with "space bar" button. And it worked as expected.