Hi, I just upgraded providence from 1.6.3 to 1.7.5. Images can view normally, however, I cannot use Mirador or Universal Viewer to view the pdfs. PDFs either uploaded in 1.6.3 or 1.7.5 also failed....The chrome is crushed when loading the pdf. What steps have I missing? Using Ghostscript and GraphicsMagick. Thank you very much!