Greetings yaxkin,
Since updating can help resolve unexpected issues, ensure that your iOS is updated. Before you update make sure you have a current backup to make sure your data remains secure. How to back up your iPhone, iPad, and iPod touch
To update:
"Update your iPhone or iPad wirelessly
- Back up your device using iCloud or your computer.
- Plug your device into power and connect to the internet with Wi-Fi.
- Go to Settings > General, then tap Software Update.
- If you see more than one software update option available, choose the one that you want to install.
- Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now." Update your iPhone or iPad
If you are still unable to click the certificates, Contact Apple Support for additional guidance.
Best wishes.