Cannot manually work all horses

I couldn’t find the prior post where this was mentioned. I wanted to give my Saturday-entered horses a final manual workout. I selected all to work 1 mile gallop, surface selected, and hit work. Only A-D horses had a workout result. I went back to re-selected horses who didn’t work to try again, hit submit, and just got a blank workout page:

sdftg

Tried To Work:
Alexander Hamilton - [color=blue]Worked[/color]
Caleuche - [color=blue]Worked[/color]
Dr. Good - [color=blue]Worked[/color]
Faint Flower - [color=red]Did not work / blank workout page[/color]
Rumpelstiltskin - [color=red]Did not work / blank workout page[/color]
Sandglass - [color=red]Did not work / blank workout page[/color]
Silver Spoon - [color=red]Did not work / blank workout page[/color]
Studio Ghibli - [color=red]Did not work / blank workout page[/color]
Temarak - [color=red]Did not work / blank workout page[/color]
Terrific Wealth - [color=red]Did not work / blank workout page[/color]

I thought it could be fixed with a system setting, but it’s not as easy as that, so I think it needs a rewrite of the workouts page/functionality.