Hi, the icons are broken under 3.12 see linked screenshot.
I see this in the console.log:
https://matomo.miraheze.org/index.php?date=2019-10-03,2019-11-01&forceView=1&viewDataTable=sparkline&module=API&action=get&widget=1&disableLink=0&idSite=1&period=day&columns=nb_searches%2Cnb_keywords&colors=%7B%22backgroundColor%22%3A%22%23ffffff%22%2C%22lineColor%22%3A%22%23162c4a%22%2C%22minPointColor%22%3A%22%23ff7f7f%22%2C%22maxPointColor%22%3A%22%2375bf7c%22%2C%22lastPointColor%22%3A%22%2355aaff%22%2C%22fillColor%22%3A%22%23ffffff%22%7D Failed to load resource: the server responded with a status of 500 ()
When going to the url, i see: "Too few arguments to function Davaxi\Sparkline::setData(), 0 passed in /srv/matomo/core/Visualization/Sparkline.php on line 65 and exactly 1 expected
in /srv/matomo/vendor/davaxi/sparkline/src/Sparkline/DataTrait.php line 48 "
I also installed the DeviceDetectorCache plugin during the update.
composer dependancies was out of date