Some websites provide certain restrictions to gain immediate access depending on the web browser you are using.
It may happen that while using Safari to purchase your Creately subscription and selecting PayPal as a payment option, you’ll be presented with an indefinite loading view of the PayPal button.
In the event that this happens, you will notice a Pop-up window blocker on the URL bar of the browser.
You can simply navigate and select the pop-up content to display the blocked window, which will then re-direct you to the usual PayPal login screen where you will then be allowed to continue with your purchase!
Refer to the GIF below:
How to allow pop-ups for PayPal payments
If in case you are using a different web browser and are facing a similar issue, the solution is the same where you must simply navigate and select the pop-up content displayed on or beside the URL bar to allow it to load.