Hello Natasha! you helped a lot, thank you
I finally found out what was going on there.
I’m using IIS, and actually the .htacces conversion was being done correctly.
But the problem was in the URL generated by the CMS.
take a look, this is the URL generated by the CMS:
https://MYCMSADDRESS/api/authorize?state=.........
But both HTACCES and web.config expected the slash “/” after the “authorize” word in the regex pattern like this:
https://MYCMSADDRESS/api/authorize/?state=.........
So I changed the pattern rule to redirect to “api/authorize/index.php” file without the need for slash after “authorize”
Like this:
<add input="{URL}" pattern="^/api/authorize.*$" ignoreCase="false" />
This is how the connection with canva worked to me. 