I received an author font from a client, which was prepared especially for their company. Unfortunately, the font does not have Polish characters and several errors pop up when installing it.
I am looking for a graphic designer who has experience in font development and is able to investigate the matter, add Polish and German diacritical marks and verify why these errors appear when installing on both macOS and Windows.
For those interested, I will send the font for review. In the attachment I show what this font looks like based on a few characters. It is quite unusual.