# Errors in the web interface

**URL:** <https://www.wago.community/t/errors-in-the-web-interface/706>\
**Category:** Hardware and Linux\
**Tags:** pfc200\
**Created:** [November 30, 2023, 10:50pm UTC](https://www.wago.community/t/errors-in-the-web-interface/706 "2023-11-30T22:50:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [November 30, 2023, 10:50pm UTC](https://www.wago.community/t/errors-in-the-web-interface/706/1 "2023-11-30T22:50:10Z")

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Good afternoon, I have encountered a problem. I open the web interface and windows with errors pop up:

- Failed to read clock data.
- Failed to read PLC Switch data.
- Failed to load LED configuration  
PLC: 750-8212 / FW: 04.04.03(26) / HW: 05

![2023-11-16_11-03-12](https://sea2.discourse-cdn.com/flex016/images/transparent.png)

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**Author:** ![PatrickR](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/patrickr/32/262_2.png) [@PatrickR](https://www.wago.community/u/PatrickR)\
**Post date:** [December 1, 2023, 6:19am UTC](https://www.wago.community/t/errors-in-the-web-interface/706/2 "2023-12-01T06:19:20Z")

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Hi,  
This could have happened after a FW update if your browser still has the old wbm in the cache. In most cases, it should be enough to clear the cache.

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [December 26, 2023, 12:02pm UTC](https://www.wago.community/t/errors-in-the-web-interface/706/3 "2023-12-26T12:02:42Z")

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I noticed that this only happens when opening a page in http; when opening a page in https, there are no such messages.

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**Author:** ![TomasD](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/tomasd/32/2042_2.png) [@TomasD](https://www.wago.community/u/TomasD)\
**Post date:** [March 15, 2024, 2:53pm UTC](https://www.wago.community/t/errors-in-the-web-interface/706/4 "2024-03-15T14:53:46Z")

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Cache cleared but the error remained in http, no similar problem when I go under https