ValueError: Tag "<locals>" does not corespond to any known ansi directive, make sure you did not misspelled it

I get this error when deploying app on Heroku, locally all seems fine. Any idea how can I fix this?

ValueError: Tag "<locals>" does not corespond to any known ansi directive, make sure you did not misspelled it

[Delgan]

Which Loguru version are you using? This error may happen if you use opt(colors=True) (formerly opt(ansi=True)), because Loguru will try to convert markup found in logged string to ansi color codes. If a markup is found but does not correspond to any known color (like <locals>), then an error is raised. It may also happen depending on the format used by your handler. You can try to .remove() the default handler, and .add() a new one while enforcing colorize=False.

I can’t help you much without seeing code. 😕

[Delgan]

@khanfarhan10 Ideally, opt(colors=True) should be used only locally where you know the message won’t contain any markup tag.

However, you can escape the invalid tag as follow:

logger.info("Logger is enabled\<space>")