problem to view message from gmail

[cereal killer]

hello everybody!
i just installed Acqua mail and set it for gmail. i don't have gmail app so i set it with imap protocol.
I can see all message inbox but when i want read it this message appears (see on attached file)
 
any idea?

[Kostya Vasilyev]

It's not a Gmail problem or a Aqua Mail problem.

The Android "piece" which we (and all other email apps) use to display message text is either missing or corrupted.

On 5.0 - 6.0 inclusive it's

https://play.google.com/store/apps/details?id=com.google.android.webview

On 7.0 and newer it's

https://play.google.com/store/apps/details?id=com.android.chrome

Please try to "uninstall updates" using the Google Play app, reboot the phone, re-install updates - should fix it.