New Tab empty on the latest Brave Nightly for Linux

Description of the issue:

When opening a new tab on Linux, instead of Brave Dashboard, I’m getting an empty page with the following JS Console output:

load_time_data_deprecated.js:4 crbug/1173575, non-JS module files deprecated.
(anonymous) @ load_time_data_deprecated.js:4
brave_new_tab_page.bundle.js:2 Error: Unexpected condition on chrome://newtab/: Could not find value for rewardsPayoutCompletedText
at expect (load_time_data_deprecated.js:4:1346)
at LoadTimeData.getValue (load_time_data_deprecated.js:4:302)
at LoadTimeData.getString (load_time_data_deprecated.js:4:412)
at o (brave_new_tab_page.bundle.js:2:160809)
at xr (brave_new_tab_page.bundle.js:2:468584)
at brave_new_tab_page.bundle.js:1571:2036
at Ai (brave_new_tab_page.bundle.js:1571:2256)
at $l (brave_new_tab_page.bundle.js:2:63311)
at _i (brave_new_tab_page.bundle.js:2:74892)
at $s (brave_new_tab_page.bundle.js:2:120662)
pi @ brave_new_tab_page.bundle.js:2
brave_new_tab_page.bundle.js:2 Uncaught Error: Unexpected condition on chrome://newtab/: Could not find value for rewardsPayoutCompletedText
at expect (load_time_data_deprecated.js:4:1346)
at LoadTimeData.getValue (load_time_data_deprecated.js:4:302)
at LoadTimeData.getString (load_time_data_deprecated.js:4:412)
at o (brave_new_tab_page.bundle.js:2:160809)
at xr (brave_new_tab_page.bundle.js:2:468584)
at brave_new_tab_page.bundle.js:1571:2036
at Ai (brave_new_tab_page.bundle.js:1571:2256)
at $l (brave_new_tab_page.bundle.js:2:63311)
at _i (brave_new_tab_page.bundle.js:2:74892)
at $s (brave_new_tab_page.bundle.js:2:120662)
expect @ load_time_data_deprecated.js:4
getValue @ load_time_data_deprecated.js:4
getString @ load_time_data_deprecated.js:4
o @ brave_new_tab_page.bundle.js:2
xr @ brave_new_tab_page.bundle.js:2
(anonymous) @ brave_new_tab_page.bundle.js:1571
Ai @ brave_new_tab_page.bundle.js:1571
$l @ brave_new_tab_page.bundle.js:2
_i @ brave_new_tab_page.bundle.js:2
$s @ brave_new_tab_page.bundle.js:2

Steps to Reproduce (add as many as necessary):

  1. Install latest Brave Nightly on Linux
  2. Open New Tab
  3. See the empty page
  4. Open Developer Tools
  5. See the error in the console

Actual Result (gifs and screenshots are welcome!):

Expected result:

Brave Dashboard as before

Reproduces how often:

Every single time

Operating System and Brave Version(See the About Brave page in the main menu):

Ubuntu 25.10 Beta / Brave 1.84.32 (Official Build) nightly (64-bit) Chromium: 140.0.7339.80

Additional Information:

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