# Can custom CSS cause an error when trying to upgrade?

**URL:** <https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867>\
**Category:** Self-hosting\
**Tags:** multisite\
**Created:** [March 6, 2019, 2:39pm UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867 "2019-03-06T14:39:22Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![codinghorror](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/codinghorror/32/110067_2.png) [@codinghorror](https://meta.discourse.org/u/codinghorror)\
**Post date:** [March 7, 2019, 12:54am UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867/2 "2019-03-07T00:54:37Z")

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Unlikely, it is almost always third party plugins .. but you should follow the advice listed there and scroll up to look for the error.

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_[View the full topic](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867)._