I have WordPress with Thimpress Eduma/Learnpress installed on top of WordPress. After I updated to latest WordPress, many images are not found. If you want to see what images are influenced, see: https://www.csv-viden.dk/events/2018atso/ and then furthest down is the share icons ("Del" in Danish). Right now your plugin is disabled, so the images are shown.
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Thanks for report the issue,
I should add an option to choose font awesome version, can you please tell me which version are you using?