I was having this same issue today. P.S. I’m not a developer
So I wasn’t able to get beaver builder to engage on the static homepage. This happened once before, and increasing my php memory limit to 512 was the answer.
This go around, what worked was enabling zlib.output_compression in my multi php manager in cpanel.
I’m not sure if this will work for others, but the fact that it worked for me, and only takes a minute or two to try, I figured I would post it. Perhaps this is a server/hosting specific issue, but for me it definitely worked.