> $ wget -v4U "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0" https://www.idrix.fr/VeraCrypt/canary.txt--2020-06-01 09:15:48--
> https://www.idrix.fr/VeraCrypt/canary.txt
> Connecting to 127.0.0.1:8118... connected.
> ERROR: The certificate of ‘www.idrix.fr’ is not trusted.
> ERROR: The certificate of ‘www.idrix.fr’ has expired.

Most likely, this is the following problem.

https://www.agwa.name/blog/post/fixing_the_addtrust_root_expiration

Apply the workaround described there, via

dpkg-reconfigure ca-certificates

--
Ian