Hi @SIOS Covas  Welcome to Box community!

One of two things may be happening:
Either the Admin has enabled a feature that blocks unpublished applications, unless explicitly identified by the API Key/Client ID
Or, you may be missing a critical step in the setup of a Server Authentication JWT-based application.

If the setting to disable unpublished application is enabled the Admin will want to whitelist your application by adding its API key just above the "Custom Applications" section in an area labeled "Application Settings".

From here, the Admin will see if the option to "Disable apps by default" is enabled next to Unpublished Applications and will be presented with a form field to enter the API Key/Client ID of your application.

The latter requires that the Admin grants access to your application from the Admin Console. You may visit our article on Authentication with JWT.

In the event that you need further assistance, you may submit a support ticket here to get in touch with our Product Support. 

Hi @JeyBueno Box 

Thank you for your response.

Our app is created with "OAuth 2.0." We will have the customer check their settings for blocking unpublished applications.

However, the following question remains unresolved, so please let us know if there are any other settings that could be causing this issue.

◆Question
If a Box administrator had prohibited third-party applications, the error should occur continuously.

We do not understand why the error is resolved over time.

Normally, the app is usable, but occasionally the error "The application is blocked by your administrator" occurs temporarily.

Hello @SIOS Covas Thanks for the follow up. We have limited insights regarding the issue you encountered, however, this could be based from the enterprise settings and unpublished applications.

You would need to authorize the app and whitelist it as well. Both of these can be accomplished in the Admin Console > Enterprise Settings > Apps; the whitelist is found in the “Third Party Applications” section, and the authorization is found in the “Custom Applications” section right below it.

Furthermore, as you mentioned that the error only reflects to just one specific user, should you need further assistance regarding the said issue, please submit a support ticket here to get in touch with our Product Support.

Thanks and I look forward to have this sorted out to prevent further issue in the future. 

Hi @JeyBueno Box 

Thank you for your response.

I understand the settings for custom applications.

Regarding the support ticket, I have already registered it, but there has been no response from the Box support team.

Please refer to the attached image for the contents of the support ticket registration.

The URL is here.

However, the support ticket I registered does not appear in the list, and it seems to be invisible to other users.

Could you please let me know if there is a reason why the support ticket I registered is not being published?

Dear @SIOS Covas I appreciate sharing this information! I have already raised it internally. We’ll look into the issue further and also check the pending approval status of your post in the support forum. Thanks for your continued patience.