The 1020 is a violation of a firewall rule, and that seems odd that a bunch of different sites would block your IP or choose to challenge access, this tip speaks to the 1020.
One suggestion not in that tip I found on Error 1020 Access Denied: Find out How to Fix it Fast is to check for a browser extension that blocks cookies. Quoting from the above site:
Several extensions can be installed on browsers to block the usage of cookies. Many people use this feature to browse more privately.
However, these tools can be the cause of the problem when accessing a website that uses Cloudflare. Therefore, it is important to check if there is one installed in your browser and temporarily disable it to verify whether the problem will be solved.
Another option is to contact a couple of the sites and see if you can have them check to see why they’re blocking access.
Good luck and let us know what you find.