Flushed dataset, didnt work, though to be honest didnt expect it too as I was trying to download, not run in sandbox

Here is the full error

Fatal error: Call to a member function registerFilterRequire() on a non-object in /[PATH]www.j-cook.[PATH]builder.php on line 2568

That does look like an issue in the builder doesn't it - not your component, right?

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Notably, a different error to BTB300's getData()

Typically, a failure to call a member function will be related to an incorrectly referenced model in my experience
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Gez

Ok Found your project.

EDIT : Not fixed yet.
I check it.

Seems to be fixed, but be carefull because your project is too heavy.

It passes the building, but you have some ajax calls corrupted somewhere.
I think it is because you splitted your project (good), or suppressed tables AND you still kept some filters grouping in ajax ON with these tables.

EDIT : I mean, it is not your fault, it is simply because the builder has a main issue there. It do not suppress in cascad some parameters (because stored in JSON in DB).
In practical, all the tables that are referenced in the properties of any element (filter, field, etc...), stay referenced when the table is deleted.