It’s a known bug in 29.0.5 and 28.0.9.
You can either ignore the warning until the next update, which will include the fix, or patch it manually: Mimetype Warning after upgrading to 28.0.9 or 29.0.5 - #17 by bb77
It’s a known bug in 29.0.5 and 28.0.9.
You can either ignore the warning until the next update, which will include the fix, or patch it manually: Mimetype Warning after upgrading to 28.0.9 or 29.0.5 - #17 by bb77