The error seems to be from the resizing..in(width+'x'+height+'^'). Do you have imagemagick installed on the server?
@baris I Installed but not working.
@julian Cool, that fixed it thanks mate.
This site runs master from github with latest versions of the persona theme.
@baris fixed this, but he forgot to tell you that he did marked as solved!
Should be fixed now. Updated the solr plugin to latest.
I've managed to reproduce the issue on Win2k8R2. It's coming from ImageMagick not being installed/configured correctly.
These are the steps I took to fix the issue:
Go out and install the latest version of ImageMagick
After running the installer make sure that you close the command prompt from which you are running NodeBB.
Open a new command prompt and rerun node app.js
The problem should be fixed!