Hello there @iyem-polat,
hope you’re doing good today! 🙂
You can try to surpass that, if that’s the only issue, with a custom CSS rule like this:
.wpmui-blur {
-webkit-filter: none !important;
-moz-filter: none !important;
filter: none !important;
}
You can use admin CSS with different approaches:
https://wordpress.org/plugins/add-admin-css/
https://davidwalsh.name/add-custom-css-wordpress-admin
https://css-tricks.com/snippets/wordpress/apply-custom-css-to-admin-area/
But this seems more like a conflict with another plugin or active theme. In order to narrow this down, you should perform a conflict test.
First, create a recent backup in case you lose any settings during the test and have to restore to a previous working state.
Then deactivate all plugins and MU-plugins apart from Custom Sidebars, activate a default theme like TwentySeventeen, clear all caches and check again if the issue is still there. If not, it means that something is conflicting, so start activating the remaining plugins and theme, one by one this time, checking every time for the reported issue, until you reproduce it again, thus finding the conflicted combination. The following flowchart image can assist you during this test: https://premium.wpmudev.org/wp-content/uploads/2015/09/Support-Process-Support-Process.gif
If this is a live website with traffic, I’d rather advise to create a staging environment, meaning a complete and exact copy of this installation into another location/folder in the same server, using a separate database, and perform the test in there instead without worrying about the live site.
Warm regards,
Dimitris
Hi Dimitris, thanks for your solution. Done with CSS rule. I ll try conglict test another time. Cya.