# \[Issue\] Uncaught TypeError: Cannot read properties of undefined (reading 'some')

**URL:** <https://community.auth0.com/t/issue-uncaught-typeerror-cannot-read-properties-of-undefined-reading-some/189934>\
**Category:** JWT.io\
**Tags:** issue, jwt\
**Created:** [July 30, 2025, 6:19pm UTC](https://community.auth0.com/t/issue-uncaught-typeerror-cannot-read-properties-of-undefined-reading-some/189934 "2025-07-30T18:19:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![javier-mino\_globant](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/javier-mino_globant/32/75971_2.png) [@javier-mino\_globant](https://community.auth0.com/u/javier-mino_globant)\
**Post date:** [July 30, 2025, 6:19pm UTC](https://community.auth0.com/t/issue-uncaught-typeerror-cannot-read-properties-of-undefined-reading-some/189934/1 "2025-07-30T18:19:49Z")

</div>

Generate Example not working  
Steps:

- Click on “Generate example”
- Click on “Select a signing algorithm”
- Select any algorithm

Expected:

- An example is created with the selected algorithm

Actual:

- “Select a signing algorithm” is still shown in the dropdown and no example has been generated with the selected algorith

Browser: Version 138.0.7204.183 (Official Build) (arm64) on MacOs

Details:  
Console shows the following error:

```auto
fd9d1056-4c23d4d68e9bc90d.js:1 Uncaught TypeError: Cannot read properties of undefined (reading 'some')
    at page-86d12a1881f29978.js:1:2001
    at Array.find (<anonymous>)
    at l (page-86d12a1881f29978.js:1:1983)
    at onChange (page-86d12a1881f29978.js:1:2577)
    at 585-97864084512117e3.js:1:86457
    at t.onChange (585-97864084512117e3.js:1:63722)
    at t.setValue (585-97864084512117e3.js:1:63984)
    at t.selectOption (585-97864084512117e3.js:1:64432)
    at D.h (585-97864084512117e3.js:1:80973)
    at Object.a_ (fd9d1056-4c23d4d68e9bc90d.js:1:72146)

```

---

<div class="post-metadata">

**Author:** ![javier-mino\_globant](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/javier-mino_globant/32/75971_2.png) [@javier-mino\_globant](https://community.auth0.com/u/javier-mino_globant)\
**Post date:** [July 30, 2025, 6:20pm UTC](https://community.auth0.com/t/issue-uncaught-typeerror-cannot-read-properties-of-undefined-reading-some/189934/2 "2025-07-30T18:20:50Z")

</div>

One more thing:  
It was working this morning 10AM CST