Cannot reproduce error [E_NOTICE]

[SenseiXS]

Affected version

2.1.7

Good evening,
several errors of the same style appeared on my admin.php
Where do they come from?

Best regards

 

[Chris D]

This isn’t something we would usually expect to see so it is possible that a modification to one of your templates has triggered the error.

Does the error still persist? Are you able to let us know the contents of your extra.less template? It seems to be the version of the template in your style that has an ID of 5 if that helps.

 

[ratix_gunz]

Generally, the error comes from the extra.less. I have already had this type of error but after hours of research, i saw that a css code was present and returned to conflict.