Drupal 8.x

Hi team, im having an issue

I would like to clear cache when i create or edit a node and i click save button, i'm trying to do it with this code:

Using Drupal 9

When I create a new Role, it doesn't get all the check-boxes beside permission options, role of Administrator also doesn't have all checkboxes.

check a screen capture on this link:  http://davitzargarian.ca/albums/vako/permissions.jpg

I didn't have this issue with Drupal 7, so hopefully there's a fix.

drupal 8.9.15

token 8.x-1.9

token filter 8.x-1.2

I have a text field set to full html,  in text formats i have replace global and entity tokens with their values checked.

I have a content type "cars" with an entity reference to another content type called drivers.  drivers has a text field called driver_notes ( i can get the exact machine names if needed. )  

the cars content type uses a drop down to select a "driver"  and this is a required field so it can not be blank. 

Hello,

we've got a website developped with drupal 8. We use memcache to increase performance. But randomely we've got an increasement once a week or less or more, and the website is breaken. Is there an expert in drupal cache to help us?

Thanks a lot.

Hi, I have tried to update a drupal 8.x site tot the latest version of drupla 8 (8.9.15) When i did that i saw a correct frontpage. But if i clcik on a menu-items i got a blank page. I restored the old core and vendor folder, the setting.php and the file in the root map. I now see the correct frontpage, but when i click on an item, i got the message :

==========================

Not Found

The requested URL was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.