i posted something similar a long time ago when i first tried to make a preprocessor and it gave errors until i had fullscreened the page and then minimized it. Again tried to delve in to preproccessors just now and again unsolvable errors and this time fullscreening did not fix it.

maybe it has to do with caching or something else? there is nothing typed about it on the preproccessor page about an issue. The inlineindent preprocessor seems to work without issue. its only newly created preprocessors that are problematic

like here https://perchance.org/46avv2s7of