# Unable to apply custom template - version mismatch?

**URL:** <https://forum.collaboraonline.com/t/unable-to-apply-custom-template-version-mismatch/3885>\
**Category:** Installation & Configuration\
**Created:** [July 14, 2025, 10:59am UTC](https://forum.collaboraonline.com/t/unable-to-apply-custom-template-version-mismatch/3885 "2025-07-14T10:59:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DierkDroth](https://avatars.discourse-cdn.com/v4/letter/d/cab0a1/32.png) [@DierkDroth](https://forum.collaboraonline.com/u/DierkDroth)\
**Post date:** [July 14, 2025, 10:59am UTC](https://forum.collaboraonline.com/t/unable-to-apply-custom-template-version-mismatch/3885/1 "2025-07-14T10:59:27Z")

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Hi,

I wanted to apply a custom template to my custom Collabora **Online** installation. AFAIK a custom template needed to be created by Collabora **Office** , since there is no way to create a template by Collabora Online - please correct me if I’m wrong.

Today I installed Collabora **Office** on my Windows machine - which came as 24.04.15.3.  
~10 days back I installed Collabora **Online** on my AWS EC2 instance - which came as 25.04.3.1-1.

Today I created a template file using Collabora **Office** and tried to apply it by setting `TemplateSource` in the `CheckFileInfo` request. This failed and I found these errors in the CODE log:

```auto
Jul 14 10:39:54 code-dev coolwsd[210267]: wsd-210267-210280 2025-07-14 10:39:54.867165 +0000 [websrv_poll] WRN Client - server version mismatch, disabling browser cache. Expected: e724e42045; Actual URI path with version hash: /browser/dist/cool.html| wsd/FileServer.cpp:913
Jul 14 10:39:54 code-dev coolwsd[210267]: wsd-210267-210280 2025-07-14 10:39:54.969847 +0000 [websrv_poll] ERR FileServerRequestHandler: File not found: Invalid URI request (hash): [/browser/e724e42045/branding.js].| wsd/FileServer.cpp:1173
Jul 14 10:39:55 code-dev coolwsd[210267]: wsd-210267-210280 2025-07-14 10:39:55.003789 +0000 [websrv_poll] ERR FileServerRequestHandler: File not found: Invalid URI request (hash): [/browser/e724e42045/branding.css].| wsd/FileServer.cpp:1173
Jul 14 10:39:55 code-dev coolwsd[210267]: wsd-210267-210280 2025-07-14 10:39:55.121474 +0000 [websrv_poll] ERR FileServerRequestHandler: File not found: Invalid URI request (hash): [/browser/e724e42045/branding-desktop.css].| wsd/FileServer.cpp:1173
Jul 14 10:40:05 code-dev coolwsd[212898]: kit-212898-212898 2025-07-14 10:40:05.451093 +0000 [kitbroker_01e] ERR ToMaster-2f6: Failed to save template [file:///tmp/user/docs/MQaUvHvpQ0OJ2vhy/sss]| kit/ChildSession.cpp:1001

```

This suggests a version mismatch where supposedly **the version of the template file does not match the CODE server version**.  
Next I tried to ‘downgrade’ my CODE installation but found that there actually is no `24.04.15.3` version available and `dnf install -y coolwsd-24.04.15.3` failed.

How could I create a custom template file for my custom Collabora Online installation?  
How could **I match the Collabora Online and Collabora Office versions**?

Any pointer or hint would be highly appreciated. Thanks in advance