Never scraped Instagram before… Scraping my own profile of two dozen photos resulted in this same warning. There has been a site change of some kind, or the method used to download is causing the error. Probably a mix of both. [edit]

Wondering the same thing. My current settings are as follows, but I still get the same warning as OP and need to keep grabbing a new cookie login.

"sleep-request": [30.0, 60.0],
"sleep-429": [60.0, 90.0],
"sleep": [30.0, 60.0],
"sleep-extractor": [30.0, 60.0],

@phere-x -- Did you find any solutions since you opened this issue? Thanks.

Any updates?

No change, I just rarely use it now because I don't want to risk anything. And even after not using it for a long period the warning still pops up in the rare moment I try it after a few uses.

One solution I saw passed around for another similar tool was throttling the speeds when downloading - not the sleep time between a process. Haven't tested it out but it might be the solution.
Think the tool that was mentioned was "trickle" but it might've been old or something & so I lost focus on it for a bit & forgot till now.

@phere-x I appreciate the info. I'll play around with it when I have the time.

I think this was it! I started using it again about 2 days ago now. The same amount, if not a tad more, and had no issues on the rate limiting side.
(p.s. I also just discovered -r, --limit-rate 😅 after using the method below. Gonna test with this.)

I dropped my sleep duration back down to 16.0-32.0 (relatively low for me) and used the pv command (sudo apt install pv https://www.cyberciti.biz/open-source/command-line-hacks/pv-command-examples/).

Example usage:
gallery-dl instagram.com/cristiano | pv --rate-limit 15 > ./output.file

This limits it to 15 bytes - I was playing super safe so went with that. Just now though I increased it to 320Kb (pv --rate-limit 320K) & removed the output file as I didn't need it. The guy in the other repo said to do anything below 500Kb.