When saving plugin settings on a site for the very first time, the Refresh Time value is empty which throws an error on save. After returning to the page, the input is prefilled with the default 500 (millisecond) value and saving is fine.
Hopefully, the video below helps you recreate it. This site is using multi-site.
When saving plugin settings on a site for the very first time, the
Refresh Timevalue is empty which throws an error on save. After returning to the page, the input is prefilled with the default500(millisecond) value and saving is fine.Hopefully, the video below helps you recreate it. This site is using multi-site.
https://user-images.githubusercontent.com/12031196/116968916-4e6cb980-acad-11eb-8a74-cd376bfab2d6.mp4