Field-level setting in the Campaign object

Question

• In my project, I create the Campaign object through Site.
• On public site setting, I configured (FLS)field level setting for all Custom fields in the Campaign Object.
• Access the site above to create new Campaign Object.

Expected: Campaign will be inserted in table Campaign.
Actual: Campaign insert fail.

When run debug, I saw this problem occur when I check FLS(in my source code).
All custom fields is not creatable although they was set before.

I cannot understand. Please help me clear this case.
P/S: I think my problem is similar this topic
Schema sObjectType [Object] fields isUpdateable returns false despite profile config
I checked on the "Marketing User". But occur the error:
"Marketing User is not allowed for this License Type."

How can I do to resolve it??

Answer 1

You absolutely can set a Guest Site User to be a Marketing user, you just need to get to the User page not the profile page.

I did this using the below,

select Id, username from user where name like '%guest%'

Getting the Id then populating the url: https//[your instance].salesforce.com/userId

But you could probably find a record created via the user and click through the lookup.

The screenshot below is from the edit page of site user:

Answer 2

I try to do as you say. But nothing changed. Did you save the user with "Marketing User" successful??