I just checked your
ads.txt file using Chrome tools as the Googlebot user agent, and all seems fine:
In addition, other user agent strings work as well.
Hence, there is no issue with
ads.txt (what I can see from here).
Sometimes, these things (with Google especially) take time, since the Internet is a very big “place” in the year 2020.
Your web site does throw a bunch of JS errors:
My suggestion, at this point in time, is to insure your site is free from JS errors before running third-party ad code and tags, to insure any plugins or mods to your site (other than the adcode tags) are not causing JS errors.
If you wish me to check for you again, kindly disable your ad serving plugin; and let’s check your site for JS errors without the plugin enabled.
Hope this helps.