Hey there, @Anitamar
Thanks for coming to the Spotify Community!
If you're still experiencing this, can you let us know if trying things again from:
- A different device
- A different web browser
- An Incognito/private browser
If the user's you're trying to invite haven't opened their Spotify accounts yet, we'd also recommend asking them to open an account with Spotify, before sending the invites to their email 🙂
Let us know if this does the trick.
We're here, and happy to help.