You might try clearing the cache for the camera app. To do this go to Settings->Apps and find the camera app in the list. Click on it and tap the option to clear the cache. It’s a little bit down the page on the right.
Well, I just looked at that in my phone and the camera app doesn’t show that it has a cache.
However I have a different version of Android so that may not be the case with your phone. If there is no cache clearing option try disabling the app. It will give you all manner of dire warnings. Ignore them with impunity. After it is disabled go up one level to where all the apps are listed and swipe over to the Disabled list of apps and re-enable it. If there was a problem with an upgrade to the camera it will now be back in its original state. If it works you are good to go. If it doesn’t then it may be time to ask the app vendor if this is a known issue with your phone.