I am making a shopping site with EC-CUBE4.
Server: Lollipop
Database: Mysql5.6
PHP: 7.4 module
Use your own domain

The shopping site created by EC-CUBE4 is no longer displayed.
I would like to know how to solve it.

The management screen login is not even displayed.
HTTP ERROR 500 is displayed.
The cause I can think of is that the other day I logged in with a different PC in a different location than usual.
At that time, I was able to log in, but I couldn't update the contents.
After that, when I tried to log in with my usual PC, the above display disappeared.
I thought it was probably an IP address problem and tried various things, but I'm sorry.
Corresponding source code
Source code
What I tried

I initialized the IP address of the .env file as follows:

Supplementary information (FW/tool version, etc.)

Please provide more detailed information here.