The error message typically appears when a document is opened on a system that does not have the original font installed. In the context of DaFont (2021) , this usually indicates that a font downloaded or used during that period is missing from the current device's local library . Analysis of the Issue
The warning isn't a death sentence for your project—but it is a wake-up call. DaFont fonts from 2021 are particularly prone to this error due to the rush of amateur uploads, incomplete character sets, and missing technical tables. font substitution will occur dafont 2021