Hello everyone!
I had the same problem and tried all the fixes with .htaccess, php.ini, and php5.ini
None worked along with a few other problems with creating sub-domains.
Got this problem solved after 3 days.
I was on a shared hosting account and these fixes would work with BlueHost.(I adjusted my max_input_vars) When I changed to BlueHost VPS hosting, these same problems came up in this post.
Now on “BlueHost VPS hosting,” it doesn’t run the apache server software on it as their shared hosting service.
When I tried these fixes and used the infor.php file trick, it lied to me.
I talked to VPS tech support and they changed those upload limits for me.
Now my media upload “popup window” went from 10MB to 50MB limit.
All is good now and I will grow back my gray hairs.
P.S. I did check my server log from my cPanel and it lied to me also.
Things are different and it all depends on the server software and version that your hosting service is using. BEST to check with them on this type of problems. You will sleep better afterwards.
Have a good day!!