Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
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. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
-25.0.13 - Operating system and version (e.g., Ubuntu 24.04):
ubuntu 22.04
- Web server and version (e.g, Apache 2.4.25):
replace me
- Reverse proxy and version _(e.g. nginx 1.27.2)
replace me
- PHP version (e.g, 8.3):
replace me
- Is this the first time you’ve seen this error? (Yes / No):
No
- When did this problem seem to first start?
Half an hour after freshly deploying the server
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Proxmox VM
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
Yes
Summary of the issue you are facing:
After turning on cloudflare tunnel, i am not able to reach to my cloudflare server using cloudflare tunnel, and then thee is error of 502 not found
Steps to replicate it (hint: details matter!):
- Install the server
- Install cloud flare and redirect it to the cloudflare tunnel using DNS
- After half anbd hour it will show the error of Bad Gateway Host error
Log entries
[Sun Jan 12 23:51:45.824590 2025] [ssl:warn] [pid 3915:tid 3915] AH01909: localhost:443:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:51:45.824741 2025] [ssl:error] [pid 3915:tid 3915] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:51:45.824750 2025] [ssl:error] [pid 3915:tid 3915] AH02604: Unable to configure certificate localhost:443:0 for stapling
[Sun Jan 12 23:51:45.825047 2025] [ssl:warn] [pid 3915:tid 3915] AH01909: localhost:12322:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:51:45.825115 2025] [ssl:error] [pid 3915:tid 3915] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:51:45.825121 2025] [ssl:error] [pid 3915:tid 3915] AH02604: Unable to configure certificate localhost:12322:0 for stapling
[Sun Jan 12 23:51:45.849683 2025] [ssl:warn] [pid 3916:tid 3916] AH01909: localhost:443:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:51:45.849759 2025] [ssl:error] [pid 3916:tid 3916] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:51:45.849764 2025] [ssl:error] [pid 3916:tid 3916] AH02604: Unable to configure certificate localhost:443:0 for stapling
[Sun Jan 12 23:51:45.849917 2025] [ssl:warn] [pid 3916:tid 3916] AH01909: localhost:12322:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:51:45.849970 2025] [ssl:error] [pid 3916:tid 3916] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:51:45.849975 2025] [ssl:error] [pid 3916:tid 3916] AH02604: Unable to configure certificate localhost:12322:0 for stapling
[Sun Jan 12 23:51:45.852999 2025] [mpm_prefork:notice] [pid 3916:tid 3916] AH00163: Apache/2.4.62 (Debian) OpenSSL/1.1.1w configured -- resuming normal operations
[Sun Jan 12 23:51:45.853016 2025] [core:notice] [pid 3916:tid 3916] AH00094: Command line: '/usr/sbin/apache2'
[Sun Jan 12 23:53:29.149893 2025] [mpm_prefork:notice] [pid 3916:tid 3916] AH00170: caught SIGWINCH, shutting down gracefully
[Sun Jan 12 23:53:29.203316 2025] [ssl:warn] [pid 3944:tid 3944] AH01909: localhost:443:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:53:29.203435 2025] [ssl:error] [pid 3944:tid 3944] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:53:29.203451 2025] [ssl:error] [pid 3944:tid 3944] AH02604: Unable to configure certificate localhost:443:0 for stapling
[Sun Jan 12 23:53:29.203709 2025] [ssl:warn] [pid 3944:tid 3944] AH01909: localhost:12322:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:53:29.203771 2025] [ssl:error] [pid 3944:tid 3944] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:53:29.203775 2025] [ssl:error] [pid 3944:tid 3944] AH02604: Unable to configure certificate localhost:12322:0 for stapling
[Sun Jan 12 23:53:29.234087 2025] [ssl:warn] [pid 3945:tid 3945] AH01909: localhost:443:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:53:29.234223 2025] [ssl:error] [pid 3945:tid 3945] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:53:29.234229 2025] [ssl:error] [pid 3945:tid 3945] AH02604: Unable to configure certificate localhost:443:0 for stapling
[Sun Jan 12 23:53:29.234394 2025] [ssl:warn] [pid 3945:tid 3945] AH01909: localhost:12322:0 server certificate does NOT include an ID which matches the server name
[Sun Jan 12 23:53:29.234481 2025] [ssl:error] [pid 3945:tid 3945] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=nextcloud / issuer: CN=nextcloud / serial: 7DCADA0EEDCE32FD4F4EB17001DB4C97D44D5520 / not>[Sun Jan 12 23:53:29.234488 2025] [ssl:error] [pid 3945:tid 3945] AH02604: Unable to configure certificate localhost:12322:0 for stapling
[Sun Jan 12 23:53:29.237924 2025] [mpm_prefork:notice] [pid 3945:tid 3945] AH00163: Apache/2.4.62 (Debian) OpenSSL/1.1.1w configured -- resuming normal operations
[Sun Jan 12 23:53:29.237947 2025] [core:notice] [pid 3945:tid 3945] AH00094: Command line: '/usr/sbin/apache2'
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
PASTE HERE
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
PASTE HERE
Apps
The output of occ app:list (if possible).
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.