mysql
Tick save to file and foreign key
ALGORITHM=UNDEFINED DEFINER=`root`@`localhost`
Replace to empty
Find `root` result = 0
Find `dbUser` result = 1
which php
Use which php command find php path
Result like /usr/local/bin/php
Pwd to get file path
Result like /home/public_html
If login See the error
It seems that /usr/xxxx is not writable.
Change permission to 775
Change var/config/system
System.php
Add Pimcore Cron Job