Scheduled Tasks with HTTPS?

Hi. I have add lets encrypt extension in plesk 12.5 and add SSL (lets enrypt) to my domain. After that I change all scheduled tasks from http to https. example:

curl --silent --user user:mypass https://www.domain.tld/my_script?param1=value1&param2=value2

but that failed now.

Can anybody help me here?

Update:
--insecure not help in curl.

I tested it with wget...

Scheduled Tasks with HTTPS?