Hello,
Please make sure that you have followed the Guidelines defined in the following Documentation link: https://xtemos.com/docs-topic/how-to-upload-custom-fonts/
If you have already followed the above then make sure that these steps are carefully followed.
In case you see “This file type cannot be uploaded due to security reasons.” Then follow the below steps:
1. Add this line to the wp-config.php file: define( ‘ALLOW_UNFILTERED_UPLOADS’, true );
2. Upload all font files formats
3. Remove this line from wp-config.php file
Also, recheck if you have removed the mentioned line from the wp-config file or not.
If both these steps are correctly followed and still facing the issue then try to reupload your Custom Font. Might be your uploaded Font has some issue.
Best Regards