Plugin Installation failure!
mod_webinar_moodle26_2014052200.zip is the latest version of webinar plugin on https://docs.moodle.org/30/en/Webinar_module
When I tried to install it, the validation failed.
Any help will be appreciated!
You may need to rename your zip file to mod_webinar.zip
But what version of Moodle are you running? It may be that a module created for Moodle2.6 is not compatible if you are running Moodle3 for example and that is why there are validation errors.
I am using Moodle 2.8 on one server and Moodle 3.0 on a different server.