Modular Routers - Format Error

[ghost]

Describe the bug

Hello,

Im playing the 1.20.1 with Modular Routers 1.20.-1.12.1 and there is an cosmetic error. When you have Upgrades in the Modular Router, and hover over it in the inventory with ur mouse it shows this.
"Format error: >%s x %s.

Hope this helps

How to reproduce the bug

Make a Modular Router, give Upgrades in them, break them and hover with ur mouse over it.

Expected behavior

There should not be a cosmetic error

Additional details

The Version is 1.20.1 but the Interface below only accepts 1.19!!!

Which Minecraft version are you using?

1.19

Crash log

No response