Typically if a issue would happen in my phone, I would at least wait 30 minutes to an hour before I try again and If I still have trouble logging in, I would at least contact Roblox Support of post on the devforum. I suggest you give that a try. Wait for Roblox to see the issue and fix it within the hour and try again.
I’ve experienced this problem before, I would usually use a Browser on any mobile device and log in, and resolve the warning issue. If that doesn’t work, try enabling “Request Desktop Site” and doing the same thing as I said before.
I had this problem about 2-3 months ago. I got warn because of the code decal I uploaded to Roblox. But I didn’t know that. When i tried to login to my account it loads and go backs to login page. I thought i got hacked.
You can easily fix it by going to google on your Ipad or whatever you want. Go to Roblox and log-in your account in Google or Safari etc. After re-activating your account, you can go back to Roblox app and you can login.
I am in the process of checking over bug reports and following up on some bugs that haven’t received any activity in a while.
Is this issue still occurring or can you confirm that this bug has been resolved? We are having a hard time reproducing this issue.
I found out that the cause of the issue was when your account was moderated with a warning which you did not yet dismiss through the website. Meaning that if you did not yet dismiss it, it would not let you log into mobile, whilst not giving you a reason as to why you can’t log in. So the fix was to go on to my computer, log into Roblox, accept the warning to get access back to my account, and then I would be logged in again.