Your comments

Good afternoon,
I made what you have indicated me and the app now works.
Thank you, although it was not necessary to treat me like a dumb person. If I had not understood you at the beginning, you could have explained it more elegantly. Anyway, again, thank you for your help.
I suppose I have finished installing the update because I do not find any update of this app when I go to the "App Store" > available updates.
I have checked my update and, currently, I have the lastest version (version 2.6).
The problem arises when I go to the app and I enter in any video, a window is opened with a message of error. I attach the screenshots when the window is opened.
I hope you can solve the problem.
Thank you for your attention.