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Issue Description:
- Suddenly unable to log into the NPrinting web console
- Error message appears in the NP web console: "Error trying to open the page."
Environment
- NPrinting: All Supported Versions
How to solve this issue:
Solution 1: NOTE: Before proceeding below, perform these elemental steps:
- Clear browser cache and close your browser,
- reopen your browser or start an incognito or private browsing session
- attempt to access the NP web console.
If you are still unable to access the NP Web Console (or NewsStand) and you still receive the error message, please proceed as per below.
Step 1: Diagnose the issue:
- Check the certificate as shown in the image below.
- If the certificate is not valid as shown in the image below, go to step 2 to resolve the issue.
Step 2: Update the nprinting.crt and nprinting.key certificate files
- Please update your certificate used to secure the NPrinting Web Console. Contact your certificate vendor for an updated valid certificate
Note: Before replacing the expired files on your NP server, you must prepare them for use with NPrinting. To do so, visit the following links:
- Installing Open SSL: https://help.qlik.com/en-US/nprinting/Content/NPrinting/DeployingQVNprinting/Installing-SSL.htm
- Managing keys and certificates - Section: Buying a certificate from a certification authority https://help.qlik.com/en-US/nprinting/Content/NPrinting/DeployingQVNprinting/Managing-cert.htm#ancho...
- If using PFX certificates, you can follow this article to configure your .crt and .key file for use with NPrinting
Once the certificates are configured correctly as per above, copy the exported certificate NPrinting.crt and the related private key NPrinting.key into these folders:
- For the NewsStand: %ProgramData%\NPrinting\newsstandproxy\.
Typical path is C:\ProgramData\NPrinting\newsstandproxy\
- For the Qlik NPrinting web console: %ProgramData%\NPrinting\webconsoleproxy\.
Typical path is C:\ProgramData\NPrinting\webconsoleproxy
- Note that if you change the file name of the exported certificate .crt and .key files, you will need to update the corresponding app.conf file in these respective folders. See https://help.qlik.com/en-US/nprinting/Content/NPrinting/DeployingQVNprinting/Installing-ssl-certific...
- Also check https://community.qlik.com/t5/Qlik-Support-Knowledge-Base/How-to-configure-a-pfx-certificate-for-use...
Short term workaround for this issue:
- If your certificate is expired as shown above, you can prevent the 'error trying to open page' message temporarily until a certificate with a valid future expiration date, simply by removing the fully qualified path to the NP server as shown below:
Solution 2:
- Check the following linked Article in case the issue is not related to an expired certificate: Error trying to open the page - Identify NPrinting Server restored with incorrect NPrinting database...
Cause
- Expired certificate used to secure the NPrinting server web console causes "error trying to open page" message and prevent further access to the NP web console
