Was hoping there was another way oh well
The above would be my advice, not ideal and it usually isn't taken but it'd certainly help.
Factory reset phone and start again. Sometimes it's the only way to sort problems, however you will loose photos ect if you never had any backup like Google photos setup
Ok so now it says computing on all my apps it won't let me delete any apps just loads and loads
I have just tried going on to clear the cache and says computing I have took a pic but won't let me do anything with it when I click on select image that is black as well