After last update, certain messages no longer open

After the update, some messages no longer open, and the app crashes. Android 7.1 Tablet

Problems with fonts or the app’s design?

What’s noticeable is that, despite the setting, the text is displayed in a light text window. Previously, it was simply white on black; the email text isn’t displayed in the dark theme or the app’s theme.

If there are different formats (due to the various fonts used in the email exchange), this seems to have recently become a problem with how K-9 Mail displays the text

I’ve already tried all the necessary settings, I cleared the cache, deleted data, and reinstalled the app

Even with the monochrome setting, some messages still won’t open, and the app crashes.

Everything still works on my other devices without the update.

But my main device, which I use for writing and take with me on the go—a small tablet with Android 7—can no longer be used with K-9 Mail