Family sharing

Hello! I have a problem accessing my family's purchases. My sister can see my purchases in the App store, but I can't see the apps she bought in the App Store and can't use them. Tell me how you can solve the problem? There was no problem of use for half a year, but now it has appeared. I relogged into my account, restarted Ipad, turned on and off access to purchases, nothing helped, so I am writing to you.