Error on Updating on Netgate 4200 24.11 from v2.3.0 to v2.3.1

[war59312]

Describe the bug
Updating from v2.3.0 to v2.3.1 resulted in the following error, after the update:

PHP Errors:
[05-Jan-2025 14:47:40 US/Eastern] PHP Fatal error:  Uncaught Error: Failed opening required '/usr/local/pkg/RESTAPI/Forms/SystemRESTAPIUpdatesForm.inc' (include_path='.:/etc/inc:/usr/local/pfSense/include:/usr/local/pfSense/include/www:/usr/local/www:/usr/local/captiveportal:/usr/local/pkg:/usr/local/www/classes:/usr/local/www/classes/Form:/usr/local/share/pear:/usr/local/share/openssl_x509_crl/') in /usr/local/www/system_restapi_updates.php:2
Stack trace:
#0 {main}
  thrown in /usr/local/www/system_restapi_updates.php on line 2

Despite the error, it updated fine.

To Reproduce
Steps to reproduce the behavior:

1. Install API v2.3.0 on 24.11
2. Upgrade API to v2.3.1 and get the error above.

Expected behavior
No error after the update.

Screenshots or Response
See the error above.

pfSense Version & Package Version:

• pfSense Version: 24.11
• Package Version: 2.3.1

Affected Endpoints:
n/a

Additional context
n/a

[jaredhendrickson13]

This is normal for a period of time after you initiate the update in the UI and should resolve on its own once the update completes. The update process runs in the background and part of that process is removing the previously installed package, which will temporarily remove some of the files the REST API forms need to render which will throw an error if you try to access the page in this state.

There's not a great way to prevent that entirely, but some changes could be made to hopefully shorten that window and make it more apparent that the behavior is normal for a short period of time after starting an update.