Invalid get index 'data' on first run when the profiles json file is created

[KANAjetzt]

In the run where the mod_user_profiles.json is created I get the following error:

E 0:00:00.336   GDScriptFunctions::call: No profile file found at "user://mod_user_profiles.json"
  <C++ Source>  modules\gdscript\gdscript_functions.cpp:775 @ GDScriptFunctions::call()
  <Stack Trace> log.gd:370 @ _log()
                log.gd:120 @ error()
                profile.gd:391 @ _load()
                mod_loader.gd:63 @ _init()