Blocked autofocusing on a form control in a cross-origin subframe

Question

Using Chrome, when I'm trying to change values of an input located in an IFrame of another app on our server, I get an error in Chrome:

"Blocked autofocusing on a form control in a cross-origin subframe."

On production (when the two apps are hosted on the same domain) it's working, but on localhost development I can't make it to work.

I've already tried starting Chrome with the following:

• --disable-web-security
• --ignore-certificate-errors
• --disable-site-isolation-trials
• --allow-external-pages
• --disable-site-isolation-for-policy

but none worked.

Has anyone has an idea how to make it work? If any change on server side needed, it's also an option.

Answer 1

1. Go to chrome://flags
2. Disable SameSite by default cookies
3. Relaunch chrome

Answer 2

For me the issue was a chrome extension ( Dashlane ). I disabled it on that site an it worked. I don't know if this helps you in any way but I had the same issue and this worked for me.

edit: I also had the issue on localhost however haven't tried it yet on server.