Some users mentioned that they were able to get rid of Instagram try again later issue by changing their Instagram password. You should also give it a try. To change Instagram password, log in to Instagram from PC and then click on the profile icon to open the profile page. After that, click on Settings given at the upper-left corner of your screen. Now, select “Change Password”. Type the old password first and then enter the new one. Confirm the new password and then click on Change Password button.
Article source: https://www.helpforsocialmedia.com/instagram-something-went-wrong/