Daniel,
Was the A_ASSET e-audit table existing or is this the first time that you are enabling e-audit on the ASSET table? If it is the first time and since you indicated this is SQL Server I would verify that SQL Server FullText Index Search is installed which is a pre-requisite. You can verify by running:
SELECT
CASE
WHEN
FULLTEXTSERVICEPROPERTY('IsFullTextInstalled') = 1
THEN
'INSTALLED'
ELSE
'NOT INSTALLED'
END IsFullTextInstalled
If the A_ASSET existed previously then what is the change you made i.e. new attribute, existing attribute but change the data type or the size, change the search type? Is there data in the A_ASSET table you need for historical reason as this may determine what steps you need to take to resolve this problem. I doubt the issue is user permission and the error is misleading and "full-text index" is the root cause and my previous suggestion is likely the fix which is to install Microsoft SQL Server Full-text Index Search https://learn.microsoft.com/en-us/sql/relational-databases/search/get-started-with-full-text-search?view=sql-server-ver16.
Mike