Hello,
After a long period of trouble, I reached my server and turned it back on a little later.

Since then, everything seems to be working except the webgui.

Even when starting on the webgui instead of the console, localhost does not work. Internet works, I type my message from the webgui ...

Please help me correct this error.

From the terminal on the GUI, enter in 

diagnostics

It'll get saved to the flash drive in the logs folder.  Post the entire zip file on your next post

I found the problem, ngnix does not launch, it returns this error:

nginx: [emerg] cannot load certificate "/etc/ssl/certs/unraid_bundle.pem": BIO_new_file() failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen('/etc/ssl/certs/unraid_bundle.pem','r') 
error:2006D080:BIO routines:BIO_new_file:no such file)

However, I have a certificate on the USB key.

I am looking for ways to correct this error.

Delete the /config/ssl folder on the flash drive and reboot.  It'll get recreated

So it works ... Almost!

When I want to connect to it, I come back to the login page without error message (no bad login or other)

Strange ...

nginx crashes randomly.

 

This can be found in /var/log/nginx/error.log

# cat /var/log/nginx/error.log 
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to unix:/var/run/nginx.socket failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to 192.168.0.100:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to [2a01:e0a:2f6:9220::188b:5653]:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to unix:/var/run/nginx.socket failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to 192.168.0.100:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to [2a01:e0a:2f6:9220::188b:5653]:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to unix:/var/run/nginx.socket failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to 192.168.0.100:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to [2a01:e0a:2f6:9220::188b:5653]:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to unix:/var/run/nginx.socket failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to 192.168.0.100:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to [2a01:e0a:2f6:9220::188b:5653]:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to unix:/var/run/nginx.socket failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to 192.168.0.100:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: bind() to [2a01:e0a:2f6:9220::188b:5653]:8081 failed (98: Address already in use)
2020/07/07 18:33:38 [emerg] 8029#8029: still could not bind()
2020/07/07 21:14:42 [info] 24358#24358: Using 131072KiB of shared memory for nchan in /etc/nginx/nginx.conf:143
2020/07/07 21:14:45 [alert] 8297#8297: *15136 open socket #17 left in connection 9
2020/07/07 21:14:45 [alert] 8297#8297: aborting

A little help would be appreciated