Here is to report a solution to a problem, maybe help someone, although this kind of thing usually only happens to me. So it was evident from the message "Not downgrading package enigma2-plugin-extension-e2iplayer on root from 20190510 to 2 + git3455 + 3c466d5-r4", neither the additional install nor force install commands helped because version 20190510 was lagging in the receiver. I couldn't find and delete it through the total commander, but last night I went into the plugins via the remote control and at the bottom it has the ability to remove or download the plugin. When I went into remove I saw that the 20190510 version I had deleted was installed as well as some other plugins that I do not use and after that I installed E2iplayer without problems through the Satvenus panel. Was it worth the headache for a few days? I think, after all, this is a fun hobby. And finally, a lot of movies, especially in HD resolution, occasionally stall and interrupt but this is probably up to internet speed (I have 25 Mbit / s download and 4Mbit / s upload).
Hello and beware of the virus.