Its works!!

1. Desinstall zapstore

2. Install zapstore from github

3. Install fountain and dont minimize the zapstore in the process

nostr:nprofile1qqs83nn04fezvsu89p8xg7axjwye2u67errat3dx2um725fs7qnrqlgpzpmhxue69uhkummnw3ezumt0d5hsftatcy downloading fountain app in zap store is getting "hash" invalid. One friend of me is having the same issue