"OAuth signature does not match" error when WP installed in subfolder

[jbvidex]

I've Googled and read through the issue queue, and it looks like this error was fixed (?) in #78, but I'm getting the same error with the latest version. Maybe because the file that the fix was merged into doesn't seem to exist in the latest version? Is /lib/class-wp-rest-oauth1.php the replacement? It looks like it has the code from #78 in it, starting at Line 660.

[jbvidex]

I have also confirmed that this error occurs when WordPress is installed on (Apache) VirtualHost sites, even if WordPress is in the DocumentRoot of the VirtualHost.

[salim523]

I also have the error. The oauth_signature I send using postman doesn't match with what OAuth1 plugin. I try to debug it but no luck. I googling for solution for past 2 days and I can't find the fix.

[clutterstack]

I'm in a similar situation. I've got a node script that can get to the point of obtaining permanent credentials, but I get a signature mismatch when I try to make authenticated requests using node.js (request library), Postman, or Paw. I'm on Dreamhost shared hosting (had to modify .htaccess so headers get through).

[joehoyle]

Closing as dupe of #200 where we'll handle Oauth signature issues unless they are a more specific.