Gateway timeout occurred while clearing hummingbird cache

I have support access on for The site gave a gateway timeout when I told hummingbird to clear cache.

I noticed this in the error log. not sure if this relates to it:
[Fri Nov 08 13:38:07.568280 2019] [:warn] [pid 22551] [client] Timeout waiting for output from CGI script /home/agelafin/public_html/, referer: