Can’t sign into App Store on your iPhone? or Mac? or iPad? or iPod? Seems like there is a bunch of apple users experienced this issue. This problem can be occurred by wrong settings or data corruption. There are three ways to solve this issues. First one is to sign out and re-login App Store. If old caches regarding your account have a problem, this issue could be happened. Second one is to correct data & time and lastly, we are going to reset network settings on your device. Hope you have figured out through those methods.
1. Sign Out from App Store & Re-Login to App Store
Step 01. Go to Settings > iTunes & App Store > Click on your Apple ID
Step 02. Sign Out from the App Store and then Re-Login to App Store. (Note. If you can’t login to iTunes on Macbook?, Try to sign out from iTunes Store and re-login to iTunes Store.)
Step 03. Try reconnecting to App Store on your iPhone or iPad or iPod.
2. Correcting Date & Time
Step 01. Go to Settings > General > Date & Time
Step 02. Turn On “Set Automatically”
3. Resetting “Network Settings”
Step 01. Go to Settings > General > Reset
Step 02. Tap on Reset Network Settings