Invocation PDF fails if HTML output included

[galaxyproject-sentryintegration]

Embedding a multiQC report is likely a common thing. For a start we could just skip these in the PDF ? This is one of @ksuderman's invocations

Sentry Issue: GALAXY-MAIN-YRC

Failed to load image at "http://chart.apis.google.com/chart?cht=bvg&chbh=8,4,2&chs=800x300&chxt=y,y,x,x&chxp=1,50.0%7C3,50.0&chg=30000.0,2.0,3,2&chxr=0,0.0,29.0%7C1,0.0,100.0%7C3,0.0,100.0&chd=e:AAAAIUAAAAAAAAAAAAAAAAAA..AAB7AAAAAAAAAAAAAAD2AAXrAAAAAAAAAAAA&chxl=1:%7CVariants%2F10Kb%7C2:%7C0%7C%7C%7C%7C%7C%7C%7C%7C%7C%7C100000%7C%7C%7C%7C%7C%7C%7C%7C%7C%7C200000%7C%7C%7C%7C%7C%7C%7C%7C%7C%7C300000%7C3:%7CPosition&chtt=Variants+histogram%3A+19LMM131MPZO42_S7_L001_R1_001_%28paired%29_trimmed_%28paired%29_contig_9": URLFetchingError('HTTPError: HTTP Error 404: Not Found')

[mvdbeek]

Might be a bit of a problem that we even attempt this ?