Pictures blurry and they disappear

Hello,

I realised today that I have two problems:

1) If I make a picture everything seems normal, but if I click on preview -> the picture is completly blurry

2) And if I click on my gallery the picture is not shown. I tried now several times. I cannot make any new pictures.

I have an ipad mini, and ios 9.3.5 , I dont use cloud.

One week ago when I last used this function everything was normal.

Maybe someone has an idea?