# Can't add any device to my Homey Pro 2023, strange app report: 'Invalid header value char'

**URL:** <https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927>\
**Category:** Questions & Help\
**Tags:** devices, homey-pro\
**Created:** [July 4, 2023, 4:37pm UTC](https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927 "2023-07-04T16:37:15Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Adam\_Vesztergom](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/adam_vesztergom/32/79247_2.png) [@Adam\_Vesztergom](https://community.homey.app/u/Adam_Vesztergom)\
**Post date:** [July 4, 2023, 4:37pm UTC](https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927/1 "2023-07-04T16:37:15Z")

</div>

Hey, I received my new Homey pro recently, but I can’t use it at all, because I can’t add any device to it. If I click any app, and add new divece than conntect, I get this message: “No new devices have been found”. I think it’s a general problem, because I tried with different devices (Ecowitt weather station and myIO smart home system). I contacted one app developer (myIO) and I sent him the app report, which was the following, but he had no idea what the problem could be:

App ID  
com.myioserver.integration  
App Version  
v2.0.0  
Homey Version  
v10.0.0-rc.110  
Stack Trace  
Note: this log has been manually submitted by a user.  
Log ID: 2239f71c-8002-48a9-8fc4-3444226c9207  
User Message:  
can’t add new device  
stdout:  
code: ‘HPE\_INVALID\_HEADER\_TOKEN’,  
reason: ‘Invalid header value char’,  
rawPacket:  
}  
2023-06-25T22:23:55.613Z [log] [myIO\_App] HTTP request error Error: Parse Error: Invalid header value char  
at Socket.socketOnData (node:\_http\_client:542:22)  
at Socket.emit (node:events:513:28)  
at addChunk (node:internal/streams/readable:324:12)  
at readableAddChunk (node:internal/streams/readable:297:9)  
at Readable.push (node:internal/streams/readable:234:10)  
at TCP.onStreamRead (node:internal/stream\_base\_commons:190:23) {  
bytesParsed: 46,  
code: ‘HPE\_INVALID\_HEADER\_TOKEN’,  
reason: ‘Invalid header value char’,  
rawPacket:  
}

Could anyone help with this problem? Is this ‘Invalid header value char’ familiar to anyone? I tried everything, same wifi network, no strange characters in any name, password etc…

---

<div class="post-metadata">

**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [July 4, 2023, 4:50pm UTC](https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927/2 "2023-07-04T16:50:14Z")

</div>

This looks like a local networking issue. Perhaps you’re using something like PiHole or AdGuard? Some sort of filtering proxy? A firewall?

Also, the firmware of your Homey is lagging a few versions, make sure it’s running the latest version.

---

<div class="post-metadata">

**Author:** ![Adam\_Vesztergom](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/adam_vesztergom/32/79247_2.png) [@Adam\_Vesztergom](https://community.homey.app/u/Adam_Vesztergom)\
**Post date:** [July 9, 2023, 6:49pm UTC](https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927/3 "2023-07-09T18:49:23Z")

</div>

Thank you for your idea, it took me a few days to get a new, clean router, with factory settings to check, if it’s a local network issue… but nothing has changed, the problem still exist… So I don’t think it’s my local network… I don’t have proxy, firewall etc. I even updated my Homey too as you suggested. I attach some screenshots. As you can see I could add a “device” actually, which is a wake on lan app isntalled on Homey, but no external device.

 ![router](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/8/2/82f428b258d49ca1ff5594ba85e7d2b6bdaf0275.jpeg)  
 ![screenshots](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/1/d1f66f17cf3613ac97f25e537e7de03b3c59e634.jpeg)

---

<div class="post-metadata">

**Author:** ![szuperp](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/szuperp/32/47661_2.png) [@szuperp](https://community.homey.app/u/szuperp)\
**Post date:** [October 9, 2023, 5:28pm UTC](https://community.homey.app/t/cant-add-any-device-to-my-homey-pro-2023-strange-app-report-invalid-header-value-char/83927/4 "2023-10-09T17:28:57Z")

</div>

Problem solved at myIO app…  
You have to update to myIO 2.0.1.