Sign in to Polish OLX app stopped working

REPRODUCIBILITY (% or how often): always
BUILD ID = OS VERSION (Settings > About product): 4.2.0.21 & 4.3.0.12
HARDWARE (XA2, X10, X10 II, …): XA2 Plus
UI LANGUAGE: English
REGRESSION: (compared to previous public release: Yes, No, ?): Yes

DESCRIPTION:

Polish OLX app installed via Aptoide (original app’s link: https://play.google.com/store/apps/details?hl=en&id=pl.tablica). I used to be able to sign in via Facebook (because email sign-in has never worked due to lack of Google Services on Sailfish, right?). All the OLX experience worked well. The sign-in started to fail after updating the Facebook app, while still using the 4.2.0.21. I tried to re-login to facebook too, no luck. Updated to 4.3.0.12, no luck. Reinstalled the OLX app too. I am prividing screenshots of relevant screens.
Maybe there are files/folders I can clean up to trigger the fix of the sign-in integration?

PRECONDITIONS:

Install Facebook and Polish OLX app. Make sure you can login to Facebook to your account.

STEPS TO REPRODUCE:

  1. Run the Polish OLX app using the icon
  2. Pick sign-in via Facebook

EXPECTED RESULT:

You’re signed-in

ACTUAL RESULT:

“Sign-in error” popup appears.

ADDITIONAL INFORMATION:

Sign-in to the app via facebook works again for me without any reinstall. It happens :slight_smile: