I've tried that as per your suggestion, and anything I do on that troubleshooting page results in
/usr/bin/nodejs: symbol lookup error: /usr/bin/nodejs: undefined symbol: nghttp2_session_get_hd_inflate_dynamic_table_size
Preparing production files...
node: symbol lookup error: node: undefined symbol: nghttp2_session_get_hd_inflate_dynamic_table_size
Interestingly, when I was playing around with this the other day and I turned off the monetization plug-in, this same error kept happening and I needed to totally rebuild countly. I'm trying to avoid that fate again....
Things I've definitely tried:
countly config list values
All result in the same error above.