Instagram: sorry request has failed?

My IPhone 7 has been acting up lately, the Wi-Fi connection is weak and lots of apps are not working due to the poor connection. Yesterday I logged out of my main account on Instagram and when I tried logging back in it says "sorry, there was a problem with your request"? I've tried restarting my phone, deleting the app and contacting Instagram but all has failed. I don't know if it's either my phone or just Instagram acting up.

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