If the app launch then the problem is the shop, not really the app.
yea the app loads up fine, ive gone into all my shop links and turned them all off then tested one at a time, none work.
only one that displays new games ect is upstash but when i try download anything it fails.
ill try look online check if its settings have changed as i dont get why it displays the new games but fails to download as all my other shop links dont display anything at all.
the ones i have are
UpStash (this will display the new games/dlc/updates section)
ChaosStash (shows nothing)
PartyShop (shows nothing)
JITS Shop (shows nothing)
Eevee Save Project (working fine)
Pengu (shows nothing)
Stealth Shop (shows nothing)
ReDump (shows nothing)
QuotaShop (shows nothing)
Rebrand (shows nothing)
each time i enable one at a time, i fully close tinfoil then open it up again.
the last time i noticed a problem like this my switch had changed its date/time settings so i set that right and it fixed the problem, but my date/time settings this time are correct so ive no clue why none of them work and only UpStash displays the new games etc in the side bar.
after looking found stealthshop setting was different to its site so changed to that and now working, maybe look see if the other ones had changed.