# Android Trust Anchor

**URL:** https://community.blockcerts.org/t/android-trust-anchor/497
**Category:** Support
**Created:** [November 6, 2017, 5:19pm UTC](https://community.blockcerts.org/t/android-trust-anchor/497 "2017-11-06T17:19:53Z")
**Posts on this page:** 5
**Page:** 1

<div class="post-metadata">

### Author: ![crivelli](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@crivelli](https://community.blockcerts.org/u/crivelli)
#### Post date: [November 6, 2017, 5:19pm UTC](https://community.blockcerts.org/t/android-trust-anchor/497/1 "2017-11-06T17:19:53Z")

</div>

Hi,  
during import of the json in the android wallet we get an error about the CA but unfortunately we didn’t find exactly which certificate is complaining about. Our certificate is made with Letsencrypt and we imported the CA into user CA of the device.

Any hint?

---

<div class="post-metadata">

### Author: ![kim](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/kim/32/307_2.png) [@kim](https://community.blockcerts.org/u/kim)
#### Post date: [November 7, 2017, 2:31am UTC](https://community.blockcerts.org/t/android-trust-anchor/497/2 "2017-11-07T02:31:16Z")

</div>

Hi @crivelli,  
Can you send an example url that it’s trying to import?  
Thanks,  
Kim

---

<div class="post-metadata">

### Author: ![crivelli](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@crivelli](https://community.blockcerts.org/u/crivelli)
#### Post date: [November 7, 2017, 8:08am UTC](https://community.blockcerts.org/t/android-trust-anchor/497/3 "2017-11-07T08:08:41Z")

</div>

Hi Kim,  
we found the error was due to a broken chain in apache that we fixed this morning, now we have another error in the cert-viewer log:  
TypeError: insert\_introduction() missing 1 required positional argument: ‘introduction’

the url we are using into the app is:  
[https://hostname.ch/samples/2.0/issuer-testnet.json](https://hostname.ch/samples/2.0/issuer-testnet.json)

thanks for your help  
Dario

---

<div class="post-metadata">

### Author: ![crivelli](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@crivelli](https://community.blockcerts.org/u/crivelli)
#### Post date: [November 7, 2017, 8:54am UTC](https://community.blockcerts.org/t/android-trust-anchor/497/4 "2017-11-07T08:54:54Z")

</div>

Hi @kim, to complete the picture we are not using mondodb we use normal filesystem

---

<div class="post-metadata">

### Author: ![kim](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/kim/32/307_2.png) [@kim](https://community.blockcerts.org/u/kim)
#### Post date: [November 7, 2017, 8:00pm UTC](https://community.blockcerts.org/t/android-trust-anchor/497/5 "2017-11-07T20:00:33Z")

</div>

Hi Dario,  
Just confirming – is this in the android app or python cert-viewer (guessing the latter based on the name). Can you send more of the stack trace?  
Thanks,  
Kim