applications – newly installed apps keep crashing/apps not showing up in settings or google play store. What do i do?

All apps installed now are not opening, they open and then jsut crash (apps downloaded before liek instagram and stuff which i already had on my tab before a certain date, all open and work fine.)

Also none of the apps are showing up in the google play store area (that tab where u can see all the apps downloaded and updates pending and stuff). Also in the setting area, when i go to ‘Device Care’, ‘Storage’, it shows a list of like Videos, Images, documents, audio and Apps with the mb next to each for how much each thing uses. But next to ‘Apps’ its says 0MB which doesnt makes sense because i have several apps and this used to work before. When i click “Apps” it jsut says ‘No files’. Please help.