PNG endpoint not working on Heroku

[DenverCoder1]

If anyone has ideas on how to fix this server error on Heroku let me know

heroku[router]: at=info method=GET path="/?user=denvercoder1&type=png" host=github-readme-streak-stats.herokuapp.com request_id=57a0d837-7f0a-4edd-b69e-3e24cee3193f fwd="185.191.205.141" dyno=web.1 connect=8ms service=395ms status=500 bytes=315 protocol=https
app[web.1]: [03-Oct-2021 13:02:55 UTC] PHP Fatal error:  Uncaught ImagickException: no decode delegate for this image format `' @ error/blob.c/BlobToImage/353 in /app/src/card.php:325
app[web.1]: Stack trace:
app[web.1]: #0 /app/src/card.php(325): Imagick->readImageBlob()
app[web.1]: #1 /app/src/index.php(70): echoAsPng()
app[web.1]: #2 {main}
app[web.1]:   thrown in /app/src/card.php on line 325
app[web.1]: 10.1.4.157 - - [03/Oct/2021:13:02:55 +0000] "GET /?user=denvercoder1&type=png HTTP/1.1" 500 - "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

[Rocksheep]

Oh I've seen this error before while I was working on the code, so I may know how to fix it.

[Rocksheep]

I see that you've reopened this. Are you still getting the same error message?

[DenverCoder1]

@Rocksheep Yeah, still getting this error. Might have something to do with Heroku.

at=info method=GET path="/?user=DenverCoder1&type=png" host=github-readme-streak-stats.herokuapp.com request_id=02523d0e-fde5-450d-8fb3-710c1438cdf9 fwd="185.191.205.141" dyno=web.1 connect=0ms service=113ms status=500 bytes=315 protocol=https
[03-Oct-2021 16:33:22 UTC] PHP Fatal error:  Uncaught ImagickException: no decode delegate for this image format `' @ error/blob.c/BlobToImage/353 in /app/src/card.php:328
Stack trace:
#0 /app/src/card.php(328): Imagick->readImageBlob()
#1 /app/src/index.php(70): echoAsPng()
#2 {main}
  thrown in /app/src/card.php on line 328
10.1.54.146 - - [03/Oct/2021:16:33:21 +0000] "GET /?user=DenverCoder1&type=png HTTP/1.1" 500 - "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

[Rocksheep]

It looks like it's not recognising the SVG as an SVG... Can you give me the version of PHP and imagick that the Heroku instance is using?

[DenverCoder1]

@Rocksheep

   - php (8.0.11)
   - ext-imagick (3.5.1)
   - composer (2.1.8)
   - apache (2.4.49)
   - nginx (1.20.1)

Haven't tried it yet, but this seems to have a possible solution:
https://legacy.imagemagick.org/discourse-server~/viewtopic6ea0.html?f=18&t=30811&start=30

Prepend <?xml version="1.0" encoding="UTF-8" standalone="no"?> to your variable having svg text.

[Rocksheep]

Hmm strange. The versions are identical to the one I have running. We can try it with the prepended text I guess!

[DenverCoder1]

Update: It did not solve the issue

[Rocksheep]

I may have another thing that we can test. I can force Imagick to interpet the blob as an SVG. Maybe that helps?