most Icons in edit-mode are missing

[suther]

But if I uncheck this entry, they appear again:

[anto54]

I have the same problem i try to find the solution :/

[thunderflip]

I noticed that I have this problem with PHP 8 but no problem with PHP 7. I don't understand where it could be related with PHP version. I hope this could be a clue to a solution.

[Er4twXz]

after editing C:\server\Apache24\htdocs\wiki\lib\tpl\bootstrap3\iconify.php

and inserting at top of the page - after the php declaration

use dokuwiki\Cache\Cache;

and changing

$cache = new cache($cache_key, '.js'); to

$cache = new Cache($cache_key, '.js');

it works - cache is deprecated and replaced by Cache

iconify.php.txt