Cannot read properties of null (reading 'shadowRoot')

[WarC0zes]

Hi, I use lovelace-wallpanel ( https://github.com/j-a-n/lovelace-wallpanel ) and since I installed sidebar-card, I get this error.

Logger: frontend.js.latest.202307051
Source: components/system_log/__init__.py:257
First occurred: 17:49:13 (2 occurrences)
Last logged: 17:49:13

http://192.168.1.xx:8123/hacsfiles/sidebar-card/sidebar-card.js?hacstag=2418255740194:18635:23 Uncaught TypeError: Cannot read properties of null (reading 'shadowRoot')

the error appears continuously and increases the logs. Would you need other information?

I don't know if I should report the error here or on lovelace-wallpanel. Because if I delete lovelace-wallpanel, I no longer have an error.