Edited: As we see now, existing accounts work OK, but even they cannot be edited or updated. E.g. my Twiiter access token expired, but I cannot re-authenticate.

Fixed in v.50.02 on June 26.

Please turn on logs,as described here #225 including turning on "Backup log files"
Then restart device, try to create an account once, and please create a backup with data for me to analyse. Please attach the zipped backup folder to this issue, or send to me directly...

Will do!

I've emailed the logs to you@yourwebsite; I'll be happy to perform more troubleshooting.

Thank you for testing.
I can think of another way to move forward before I create the permanent fix: Restore AndStatus data from a backup, created on a device, where everything works as expected.
This device could be even an Android emulator.

Same problem on Nokia running stock Android 9

I tried to add new account in #AndStatus v.50.01, and I cannot do this either.
Actually, I'm using v.50.01 now and didn't notice any other problems yet. But I didn't add new accounts since last upgrade.
So existing users seems like unaffected by this bug.

Will fix the latest version as soon as I will be at my PC (I'm still faraway...)

For the new users:

1. Please uninstall v.50.01,
2. Install v.49 using G-Droid/F-Droid app. I just tried G-Droid, see screenshot - three versions of AndStatus are available. https://f-droid.org/en/packages/org.gdroid.gdroid/
3. Add all necessary accounts.
4. Create a backup in AndStatus Settings -> Storage -> "Back up app data to SD card".
   Backups are always good, and in a case step 5 fails you can quickly restore everything, reinstalling v.49 and then Restore this backup from the first screen of the app.
5. (optionally) Update AndStatus to v.50.01 in the same G-Droid/F-Droid app. #G-Droid misbehaved here for me on a first attempt... but after I had restarted it, it updated AndStatus successfully. https://loadaverage.org/attachment/5398183

Confirming workaround is good. ✔️
F-Droid had a problem installing v49 as a downgrade but, not having anything to lose, I uninstalled v50 first and the rest went fine.
Was able to add my accounts in v49 and then upgrade back to v50.

Now I had again part of the problem that causes I did remove and reinstall the app.

My timelines are little confused. Unread notifications shows Home (personal timeline, Inicio in Spanish version) while notifications now are shown in Interactions. But this timeline it's not shown when click on widget.

Not sure if open a new issue or wait for next version.

Regards!
Colegota

Ran into this trying out AndStatus today. It's unfortunate that this makes the app completely unusable for new users. Hopefully you don't lose too many potential adopters this way 😰

Will you please let me know when the Play store is updated? Thank you!

@remram44 Fixed in v.50,02. see #456

Looks like v50.02 was pushed to the store yesterday soon after my comment. Neat!