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If you received error 500 after upgrading the cyberpanel, you need to reinstall again using the command --force:
cd
rm -f upgrade.py
wget http://cyberpanel.net/upgrade.py
python upgrade.py --force
still error 
Same problem - i just upgraded from 1.7 to latest using upgrade.py.
Sites work but https://:8090 produces a blank page.
Heres the error log:
2019-04-19 21:30:43.072398 [ERROR] Failed to open the real time report!
2019-04-19 21:30:44.099894 [ERROR] Failed to open the real time report!
2019-04-19 21:30:45.002204 [ERROR] Failed to open the real time report!
2019-04-19 21:30:46.005782 [ERROR] Failed to open the real time report!
2019-04-19 21:30:47.008721 [ERROR] Failed to open the real time report!
Also, make sure LSCPD user is in the following groups
usermod -G lscpd,lsadm,nobody lscpd
me still error 500 on laravel web.
please help me
We are getting 500 error internal server error
https://134.119.207.145:8090/base/
CentOS7
Hello sijomon3,
Show error logs or open ticket here —> https://platform.cyberpanel.net