@David-Healey Thanks, David. I did take your courses earlier, they’re true life savers!
It also makes sense that the File.loadAsBase64String() function isn't available on the release version of HISE. I previously compiled HISE following your tutorial, but I ran into the issues I described in this forum post, where the string returned from File.loadAsBase64String() didn’t seem to be a valid base64 string. I’ll compile it again, and hopefully I won’t run into the same error. Thanks a lot!