Why am I unable to delete emails for the Maestro App?

[Kunalya]

An Email Client,Maestro App

Since installing this email client app named Maestro.
I am facing issues such as not able to delete mails from application.
Getting new parameter's error. I had given the screenshot of error.
If you know how to solve this issue then do comment. I had tried re-installing but not working.
Developer who is it?

How to contact them don't know anything?

 

[Harrie-S]

I do not know how to solve your error but i know how to contact the developer.
Open the app
Push on the 3 dots ...
Go to about
And here you find how to contact the developer.

 

[Guytronic]

I've had a few bugs with Maestro myself.
If your running Maestro from an SD card try moving it into the phone mass storage.

 

[Kunalya]

I Had uninstalled the app came on normal email account in settings.