Constant error in 1.81 when trying to use custom theme

When adjusting the theme to my custom theme in the ‘Configuration’ panel, I keep receiving the error:

“Fatal error - sorry this shouldn’t happen. Theme name ‘MyTheme’ Does not exist” - this is despite that fact that my config.php exists, which is what enables me to make the theme switch selection in the first place.

I also do not see any of the default theme files anywhere, even when searching the entire drive.

Am I missing something?

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I solved this… my PHP file was saved as .txt despite adding the extension at the end of the filename.

Feel free to delete. Apologies in advance, I’m an idiot LOL.

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