So as you all know Gmail now looks like crap, I hate the new all white layout, it's the opposite of what every other developer is doing right now with dark modes on everything. Plus overall I just don't like the new interface. I had downloaded an older verion on my last phone, a OnePlus 6T, and was successfully able to use the older version, but last week I upgraded to a OnePlus 7 Pro and now for the life of me I can't remember where I got the old version of Gmail from. I have tried a couple different websites and whne I try to install it it says "Did not Install". I have my phone setup to install from unknown sources, and I went ahead and deleted all data and cache from Gmail and disabled it, then tried the installs and none worked. if someone can help I'd appreciate it. Thanks.