I can tell you what worked for me, what i did was this worked on your iPhone, there are some steps you can take to troubleshoot and potentially fix the issue. Here's a guide to help you:- 1. Ensure Guided Access is Enabled:-   -Go to Settings on your iPhone.   -Scroll down and tap on "Accessibility."   -Under the "General" section, find and tap on "Guided Access."   -Make sure the switch at the top is turned on. 2. Set Passcode for Guided Access:-   -In the Guided Access settings, make sure you have set a passcode. If you haven't set one, Guided Access may not     work. 3. Reset Guided Access Settings:-   -If you have previously configured Guided Access settings, try resetting them:   -Go to Settings > Accessibility > Guided Access.   -Tap on "Passcode Settings."   -Choose "Set Guided Access Passcode."   -Enter your Apple ID password when prompted.   -Set a new passcode or re-enter the existing one. 4. Check Accessibility Settings:-   -Make sure there are no conflicting settings in the Accessibility section that might interfere with Guided Access.             Check other settings like Display & Text Size, Motion, Touch, etc. 5. Toggle Guided Access Off and On:-   -Turn Guided Access off and then on again:   -Go to Settings > Accessibility > Guided Access, & Toggle the switch off and on. 6. Reboot Your iPhone/iPads:-   -Sometimes, a simple reboot can resolve issues. Restart your iPhone and check if Guided Access works afterward. Follow for more details instruction below.   https://www.youtube.com/watch?v=VqJigpKMIJM&ab_channel=TheGeekPage   ... View more