Last response code: 400 -> checkpoint_required was received from instagram

Anyone knows what this error means:
Last response code: 400 -> checkpoint_required was received from instagram [accountname].

I can login via browser and phone. On Follow Liker, I've deleted the account in question, closed application, turned off computer, restarted computer, logged back on Follow Liker and created the account in question. Still getting the error message.

Settings for the account in questions were low, this is a 2+ years old account with plenty of followers and uploads, been warming it for a week with Follow Liker, less than 400 follows and unfollows per day with 90+ seconds delay time.

All other accounts no problem.

Any help appreciated.

You just need to change your proxy to a new one

You have been flagged.

Something new that you didn't do before has to be done on very slow settings.
Now you need to verify your account with a phone number.

Thanks for the replies. It seems that this account was flagged for 12 hours. It's back to normal.
I'll just have to slow things down to crawl speed. Seems that Instagram is getting pickier with settings.

colorme said:

Thanks for the replies. It seems that this account was flagged for 12 hours. It's back to normal.
I'll just have to slow things down to crawl speed. Seems that Instagram is getting pickier with settings.

Click to expand...

You mean that the checkpoint message is gone? Without phone verification?

longdouble said:

You mean that the checkpoint message is gone? Without phone verification?

Click to expand...

Correct. All accounts I handle are already phone verified, months in advance, before I start working on them.

There are two thoughts of mind with me, either this was a fluke, or Instagram is starting to take a closer look at devices that handle the accounts. I have other accounts, all on their own 1:1 proxy (ssl proxies), and those have had no problems.

I do now remember that this one account was doing scrape user, scrape photo, like at the same time. Shuffle tasks is checked.

All other accounts I have them scrape user separately, and then do scrape photo and like. Shuffle checked.

So, maybe Instagram is catching on to users that do all 3, even if shuffling between tasks. Don't know for sure, maybe it's just me.

I got the same error code,

while trying to use an old active account that has never used automation,
just a normal organic personal account.

proxy from ssl proxies, proxy is located in same city as the IP of the device the account has been using

why would I be flagged for just trying to connect, with a good new proxy from sslprivateproxies ?