This error is harmless. However, your configuration file is malformed. What u/mart1d4 said is right that the custom settings are for custom games mode (not hard). Start with the default config. You can use: https://jsoneditoronline.org/ to check your file formatting. Source: 12 months ago

Download the text file with curves from this thread: https://www.avsforum.com/threads/announcing-ratbuddyssey-a-tool-for-tweaking-audyssey-multeq-app-files.3006886/post-62226147Save your .ady file and open it here: https://jsoneditoronline.org/. Source: 12 months ago

It really depends on the device and what software it comes with natively. You should be able to edit it in whatever notes/text-based editor comes on your phone. There are also websites you can upload it to and edit it through a browser like https://jsoneditoronline.org/ or https://jsonformatter.org/json-editor. Source: about 1 year ago

I just checked, there are online JSON editors [1][2] you can edit that file in, just remove the "var data = " in the front and the ";" at the end. (need to add that back at the end so it works again). Source: about 1 year ago

Open the file with notepad and paste the text into an online editor like https://jsoneditoronline.org/ then just find the `"LuaScript": ...` field and substitute the whole line(s) for: `"LuaScript": "",`. Source: about 1 year ago

There are many minifiers such as terser and uglify. But, because minifying also require to parse the JS, it is actually possible to use esbuild and SWC to minify the code. Here's a benchmark of the main minifiers. - Source: dev.to / over 1 year ago