Why don't web fonts work on some of my sites?

Question

css

Good day, forum users!
There is one big problem... Fonts stopped working on some relatively old projects. Although the files on the server are not damaged and connected correctly. No one except us could edit the site files, that's for sure.
In general, when trying to fix something, the console hits this error:

Failed to clear temp storage: It was determined that certain files are unsafe for access within a Web application, or that too many calls are being made on file resources. SecurityError

Here is a link to a site where fonts do not work out:
eng-school.com
Who has come across this, what can you tell me ....
Thanks in advance to everyone!

Answer 1

Connection script

Answer 2

Everything seems to be connected correctly, maybe it's worth updating the fonts themselves and reconnecting new ones with Cyrillic