Black screen after rendering the video

I encountered the same issue. this might help.

Maybe you put your footage on guide layer mode by mistake. it create a tiny blue grid next to the layer which is set to guid layer. you can always turn it off by right-clicking on the layer and unchecking the "guide layer" option. It helped me out.

cheers

After experiencing this myself, I am guessing that I had Adobe Premiere open before or after I opened Adobe After Effects and attempted to render.  Since my black screen problem disappeared the following day when rendering, I think either Premiere needs to be closed or perhaps it is still using resources even after closing.  An easy solution to the black screen, at least for me, is rebooting the computer and not opening Premiere before rendering in After Effects.

thank you guys for responding.

I have installed Adobe Media Encoder and I use this software for rendering, the problem solved for me.

thanks again

Yes after effects didn't have the option to export h.264 directly and to do that you must send your render to adobe media encoder, and since you use CC2019 there are bug with the dynamic link between AE and AME, and send the render to AME did't work, so the best option is to export your file as .mov or any high quality option than create a h.264 version from AME

Try to check if you select the video output from output module setting inside the render queue. 

also i notice you just select all layers in your composition to run as solo, so instead of select all layers you can simply remove solo from all layers

I am guessing that you created your own custom rendering settings and that you have not read up on rendering. There are no known bugs using the standard workflow for rendering through the Render Cue or the Adobe Media Encoder. Since we have no idea what you are doing it's pretty hard to give you any advice other than, use the default templates and read up on rendering.