In many occasions, MX Player couldn't read the file. All files are from the same video releaser. Either it's due to poor encoding or the video file is incomplete. Else it could be even an I/O issue with your device.
can you share one of your video files with us?
If it's working on an older version, in which version it works & from where it's broken?
All previous versions can be found on our website.
If you can provide more info, it will be easier for us to identify the root cause.
There is a new log from today, 20 minutes video from another releaser with a lot of errors.
I download an old version from your website (https://sites.google.com/site/mxvpen/download ??) but when i open it says that don't can verify the license and send me to de play store for update to the last beta version, but this beta version is the version that i take this logs.
Again, sorry for my english, is hard to explain for me.
EDIT: i try 1.7.5 and 1.9.3 and still happens, so i update again to beta 1.9.10 from Google Play and in the app says that the license can't be verified...it's frustrating