fix: specify Studio as source in error message when backend serves a 404

[standeren]

Description

Specify Studio as source in error message when backend serves a 404.

Related Issue(s)

• #{issue number}

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.56%. Comparing base (cc8754c) to head (d2b1edf).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14330   +/-   ##
=======================================
  Coverage   95.56%   95.56%           
=======================================
  Files        1843     1843           
  Lines       23886    23886           
  Branches     2752     2752           
=======================================
  Hits        22827    22827           
  Misses        802      802           
  Partials      257      257           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.