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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 25
Operating system and version (eg, Ubuntu 20.04): RPi 4 Model B r1.1 , Bullseye 6.1.21-v8+
Apache or nginx version (eg, Apache 2.4.25): AIO
PHP version (eg, 7.4): AIO
The issue you are facing:
Initial Install working great. Added users, created backup, also great.
Added data, started a manual backup from AIO with stopped container. Started great.
Next day, mastercontroller is not reachable.
Starting AIO containers manually reveals Nextcloud working nominal. However, AIO interface still unreachable (from direct IP and link in Nextcloud).
Restarting the AIO mastercontainer reveals no errors. Portainer reports healthy mastercontainer.
INF ts=1684396629.3821237 msg=using provided configuration config_file=/Caddyfile config_adapter=
INF ts=1684396629.3960943 msg=failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size for details.
grep: write error: Broken pipe
[18-May-2023 07:57:09] NOTICE: fpm is running, pid 116
[18-May-2023 07:57:09] NOTICE: ready to handle connections
Starting mastercontainer update...
(The script might get exited due to that. In order to update all the other containers correctly, you need to run this script with the same settings a second time.)
Deleting duplicate sessions
[18-May-2023 08:00:33] NOTICE: Terminating ...
[18-May-2023 08:00:33] NOTICE: exiting, bye-bye!
WARNING: No memory limit support
WARNING: No swap limit support
Initial startup of Nextcloud All-in-One complete!
You should be able to open the Nextcloud AIO Interface now on port 8080 of this server!
E.g. https://internal.ip.of.this.server:8080
If your server has port 80 and 8443 open and you point a domain to your server, you can get a valid certificate automatically by opening the Nextcloud AIO Interface via:
https://your-domain-that-points-to-this-server.tld:8443
++ head -1 /mnt/docker-aio-config/data/daily_backup_time
+ BACKUP_TIME=02:00
+ export BACKUP_TIME
+ export DAILY_BACKUP=1
+ DAILY_BACKUP=1
++ sed -n 2p /mnt/docker-aio-config/data/daily_backup_time
+ '[' '' '!=' automaticUpdatesAreNotEnabled ']'
+ export AUTOMATIC_UPDATES=1
+ AUTOMATIC_UPDATES=1
+ set +x
Daily backup script has started
[18-May-2023 08:00:40] NOTICE: fpm is running, pid 107
[18-May-2023 08:00:40] NOTICE: ready to handle connections
grep: write error: Broken pipe
INF ts=1684396840.2575064 msg=using provided configuration config_file=/Caddyfile config_adapter=
INF ts=1684396840.2710838 msg=failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size for details.
Starting mastercontainer update...
(The script might get exited due to that. In order to update all the other containers correctly, you need to run this script with the same settings a second time.)
however there seems to be not actions in mastercontainer. No processes consume relevant CPU power.
This is maybe linked, and the most active process (1,3% CPU )
’ 293953 root 20 0 14536 4248 3204 S 1.3 0.1 11:44.03 entry.sh’
Already an update:
The borgbackup uses a mount point to a NAS which went down during backup.
I restarted the mount and restarted the container.
The backup resumed.
log:
Waiting for borgbackup to stop
I will wait until this finishes and provide update.
As a wish:
a broken borgbackup should not stall mastercontainer.
thanks a ton for providing AIO.