@Tereza V. - Well, that was tedious. I had to uninstall my current antivirus, installed the broken Avast app to take screenshots (If you tell me how to attach images on this forum, I'll send them to you), then I uninstalled Avast and installed the other antivirus. I think I should be getting paid by Avast at this point. By the way, this is the last feedback I'm giving you guys. At this point, I feel like the other antivirus is doing a good job.
The Avast version that is on my Play Store is version 6.15.1, which was updated on December 6th 2018, and weighs 21.46 MB. However, the version that is available on the Play Store when viewed from my computer is version 6.15.1, which was updated on December 17th 2018, and weighs 28 MB. I understand this might be caused by the regional distribution or availability of the app.
The version of the app that I am able to download from my phone is version 6.15.1 (which was updated on December 6th 2018, and weighs 21.46 MB). The virus definition is 181122-00 (22 Nov. 2018).
My family and I have all uninstalled Avast, because it went from being a great app to be a broke and useless app.
I hope this feedback helps, and I'm about to give up.