Keep it simple

Kein Mangel sondern zuviel Stickstoff durch die Jauche. Das krallen der Blatter und die verbrannten Spitzen sind die Anzeichen.

Its not missing sign, its too much nitrogen sign. Nail polish i think its called, almost verge of overfeeding which leads to toxicity and lockouts. But i see lack of magnesium, that tigery striping in colour, epsom salt or calmag in small doses would be very wise.

It is mimicking some magnesium issues, now if it does not have it or if its unavailable is the question. I agree their is to much N and in your diary it looks like you might need to work on your watering practices as the one plant looks overwatered and this will cause a lot of root issues that look like deficiencies. PH is also an issue but Its not showing to many signs of an off PH. No idea what green power or Brennnesseljauche is, maybe post some web links of the products or nutrition labels. See if they have any Mg in them, if not add in some via epsom salts. Dial back the N a bit and let it go for a bit and see how it reacts. Good Luck!

Looks a bit like a phosphorus deficiency, also little bit stressed looking.

I agree with AsNoriu: Root rot/ph off and severe Ca + Mg deficiency due to lock out

root or ph issue. problems started long time ago, like 3-4 weeks ago. i think pot was too wet for long time, aka no wet/dry cycle, so that could cause root rot or so. you gave only biobloom and some epsom salt, thats not enough for girl. a lot things could lead to such state, but watering habbit issues are the first to blame in my mind. she will still produce some buds, but be more carefull with other plants.

Just selected an answer to one of my questions. Safari, iPadOS 17.5.1 Clear your browsing data related to growdiares

Sounds like a GrowDiaries error. Just going to have to wait for it to work its self out. normally beginning of the week. Tuesday Ish. It seems like we are having weekend issues on questions quite commonly now. Just more dumb issues since the fallout of the site update. Might as well call growdiaries vault13.

clear browser cash , relogin and try again. or just thank person on chat here. most of answers or questions never meet up or been selected, so dont panic. generally, main thing you got advice. Points for answer is small rat race for prizes, it should not borther you ;) page has few issues after new years update, think they still sorting a lot, but if you want, write email to info@growdiaries.com/ add few screen shots, describe your issue.