Hello @jesyna,
Thank you for your query and we are so sorry about the trouble this must have caused.
That error means the URL was still not processed by the Indexing API from Google. It’s important to note that the requirements for that have changed and now the URLs go through rigorous spam detection.
Besides that, the guidelines now state that this is exclusive to a particular set of websites, so if your website doesn’t fall under that category or is considered spammy the submission will go through but the API will never parse the URLs.
You can check the full guidelines here: https://developers.google.com/search/apis/indexing-api/v3/quickstart
Here’s a screenshot for your reference: https://i.rankmath.com/i/kXGiqf
Don’t hesitate to get in touch with us if you have any other questions.