This site can’t be reached

[Jonh Carter]

Hello,

When I try to download  a invoice in admin area or client area I get this error given below:

This site can’t be reached The webpage at https://www.domain.com/clients/dl.php?type=i&id=1225 might be temporarily down or it may have moved permanently to a new web address.
ERR_INVALID_RESPONSE

Please help to fix the issue.

Thanks in advance

[leemahoney3]

Heya John,

Did you take a look at your WHMCS logs and your php error_log to see if anything is recorded?

[Jonh Carter]

Here is the Access log:

125.52.45.2 - - [05/Sep/2022:07:58:34 +0000] ＂GET /xxxx/dl.php?type=i&id=1234 HTTP/2.0＂ 500 41327 ＂https://www.domain.com/xxxx/xxxxx/invoices.php?action=edit&id=1234＂ ＂Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36＂

Header status code: 500
status : (failed)net::ERR_INVALID_RESPONSE

No php error. the website is working fine. only invoice download url is not working.

[Jonh Carter]

I can print it but can't download it. when I try to download it gives 500
Internal Server Error in headers. else everything is working fine.

Edited September 5, 2022 by Jonh Carter

[Jonh Carter]

i think it is due to non secure content. when i visit to invoice download url : https://www.domain.com/xxxx/dl.php?type=i&id=1234 the padlock disappear from the url bar. this is the message when in click on the icon in address bar: Your connection to this site is not secure. 

the url starts with https & ssl is installed. it seems the dl.php file include any http link that's why it giving me not secure error. i also replaces the file with the new one but giving the same error.

[yggdrasil]

Error 500 means there is something wrong in your server. The PHP file or code is basically crashing. A web server will reply with error 500 when it does not know how to handle the request. With PHP this usually means something in your code is broken or causing issues. Try enabling debugging in your WHMCS installation.

[leemahoney3]

Try disabling all hooks and addons also temporarily to see if any of them are causing it.

[WHMCS Anwar]

Hi there,

Please note that a 500 Internal Server Error is a generic error message produced by the server, often due to a misconfiguration. There are potentially a wider number of causes for such a problem, here is a brief overview of them and potential fixes:

• File Permissions are incorrectly set.  Should be (depending on server but general rule of thumb) 644 for files and 755 for folders/directories.
• PHP Memory & Process limitations - Try increasing to 128MB
• PHP Process Limitations - Check with server admin/hosting provider
• Corrupt PHP Modules, Extensions, Builds - Check with server admin/hosting provider
• The obscure - If points 1-4 don't produce a fix typically the best course of action is to check the Apache Error Logs

Although this is not a definitive list, it should provide you with a good starting point for the purposes of troubleshooting.

[Elyesa Bazna]

On 9/5/2022 at 2:32 PM, Jonh Carter said:

i think it is due to non secure content. when i visit to invoice download url : https://www.domain.com/xxxx/dl.php?type=i&id=1234 the padlock disappear from the url bar. this is the message when in click on the icon in address bar: Your connection to this site is not secure. 

the url starts with https & ssl is installed. it seems the dl.php file include any http link that's why it giving me not secure error. i also replaces the file with the new one but giving the same error.

Did you solve the problem?