When a user tries to reset their password they will get a white screen with the following error message if they input wrong Username/email address:

Template->make_filename(): Error - file message_inline.tpl does not exist

Edit:  I have not edited any of the templates and my forum is an Invision forum.  No css or js changes for the page.

Is this after they have logged onto the forum?

This is before they login.
They forget their login...so they go to the page for ppl who forgot their password. They type in their user name and email.  If they mistyped the information and click save....it sends them to a white screen with the above mentioned error.

So they are mistyping the information, and this page appears?

It even does it on the help site here

Demo:
Go to
 https://help.forumotion.com/profile?mode=sendpassword

Type in an incorrect user name and email address.
It will give you a white screen with a programming error.

I get this message:

The e-mail address you supplied does not match the one listed for that username.

I'm using my mobile phone to do this.  I guess that is the cause.  I tried mobile Firefox and chrome with the same result.  It works fine if you use the valid info for the account.

Edit:  Yes it appears only on mobile devices.  I am using the new HTC one.

So this is only happening on mobile devices?

Yes, but I don't have a desktop to test from.
I did switch from desktop mode to the mobile site and did not get the error.

Well, the mobile version is still in the beta (testing) phase.

Since this topic is marked solved I'll move it to the archives.