This article applies to Advanced Model customisers only
If you have the setting "No decimal" enabled for your customiser:
while also having fonts with minimum heights set to decimal values you will encounter this warning:
The "No decimal" setting tells our system to round any measurements that are displayed on your Customiser, meaning if we calculate that your sign height should be "10.30cm" we will round it down to "10cm" and display that to the customer. We then need to validate that 10cm value against your font min height of 10.16cm, causing a validation issue.
For this reason merchants using the "No decimal" setting are advised to set their font min heights to whole values.