To repeat, you almost assuredly have zero use or need for any of those products you bought.
How much “non liquid” came out? This ain’t your first rodeo.
If the camper was stationary while the tank was being “filled” you should not see the chunky chocolate milkshake as much as you should see some discernible tissue and baby Ruth’s.
If it’s just the liquid gettin out I’d subscribe to the cutout plug may be blocking the outlet.
But you can at least temporarily cure that by taking it for a drive and gettin the “stuff” moved around and easier to dump. Because it will likely move the disc if it’s causing the issue.
From reading your posts for years, I know you sometimes have a habit of asking for advice and then doing your own thing. Maybe someone else will validate this advice and save you some headaches if you follow it.