Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
It seems like the file is not created on your website.
Please follow these steps:
1. Go to Rank Math > Instant Indexing > Settings > API Key > Change Key
2. Copy the new API key, and create a txt file in the root directory of your website.
The name of the file should be yourapikey.txt, and the content of the file should be your API key.
Here is a screencast for your reference:
https://i.rankmath.com/OUWNtG
Let us know how it goes.
We are here to assist you.
It’s working now, thank you for the help.
Hello,
We are super happy that this issue is already resolved. If you have any other questions in the future, know that we are here to help you.
If you don’t mind us asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.
