How to resolve the error in If-Else in Salesforce Marketing Cloud AMPscript?

I am trying the If-Else condition in the code but getting the error "Internal server error". Could you please help me out on the code given below:
%%[
IF RequestParameter("submitted")==true THEN
Var @insert

SET @firstname = RequestParameter("First Name")
SET @lastname = RequestParameter("Last Name")
SET @phone = RequestParameter("Phone")
SET @email = RequestParameter("Email")
SET @rating = RequestParameter("Rating")
SET @description = RequestParameter("Description")
SET @status = RequestParameter("Status")

%%[IF Rating>=0 AND Rating<=5 THEN]
SET @insert = InsertData("UC_Target_DE",
"First Name",@firstname,
"Last Name",@lastname,
"Phone",@phone,
"Email", @email,
"Rating",@rating,
"Description",@description,
"Status",@status)

%%[ELSEIF Rating>5 AND Rating<=10 THEN}%%
SET @insert = InsertData("MT_Target_DE",
"First Name",@firstname,
"Last Name",@lastname,
"Phone",@phone,
"Email", @email,
"Rating",@rating,
"Description",@description,
"Status",@status)

%%[ENDIF]%%
]%%
%%[ ELSE ]%%
<table style="padding: 20px;"><tr><td>
<h2>Please Fill the form:</h2>
<form action="%%=RequestParameter('PAGEURL')=%%" method="post">
<label>First Name: </label><input type="text" name="firstname" required="false">
<label>Last Name: </label><input type="text" name="lastname" required="false">
<label>Email: </label><input type="email" name="email" required="true">
<label>Phone: </label><input type="phone" name="phone" required="false">
<label>Description: </label><input type="text" name="description" required="false">
<label>Status: </label><input type="text" name="status" required="false">
<label>Rating: </label><input type="number" name="rating" required="false">
<input name="submitted" type="hidden" value="true">
<input type="submit" value="Submit">
</form>
</td></tr></table>
Data saved = %%=v(@insert)=%%
%%[ ENDIF ]%%