Your server is configured to block access from different domain.
The best solution is to unlock it on your side. I could also make a proxy as middleware to solve this problem but it's too much effort comparing to first solution.
There is third option, my tool is now free to download and install it on your server where problem will not appear: https://github.com/stmn/font2bitmap
Just need to upload: https://github.com/stmn/font2bitmap/archive/refs/heads/gh-pages.zip
