Unable to set spell slot totals for Eldritch Knight

I'm using the D&D 5E sheet by roll20 and cannot get the spell slots to work for an eldritch knight. Please help.

If they haven't been calculated correctly, you'll need to go to the Attributes & Abilities tab to modify them. The spell slot totals on the Spells tab are not inputs, probably to stop people changing the wrong number each time. The attributes are called lvlX_slots_total.... for slots you don't have yet, the attribute may or may not exist - you might need to create it.

Did you check off the box in the settings for Arcane Fighter? That tells the sheet that even though you're a fighter, you should be getting the spell slots of a 1/3 caster fighter (the Eldritch Knight).