Failed to get Computed Style with Japanese Kanji

Hey guys,

since some time now my Japanese decks are failing. I have to make new ones every time. It happens only with cards with Kanji I wrote with the japanese keyboard I downloaded from Windows and cards with imagines I took in 2019 from Kanji in a book.
Error for the Kanji is this one:
Invalid HTML on card: TypeError: Failed to execute ‘getComputedStyle’ on ‘Window’: parameter 1 is not of type ‘Element’.
TypeError: Failed to execute ‘getComputedStyle’ on ‘Window’: parameter 1 is not of type ‘Element’.
at eval (eval at (http://127.0.0.1:50602/_anki/jquery.js:2:2651), :3:18)
at eval ()
at ht
tp://127.0.0.1:50602/_anki/jquery.js:2:2651
at Function.globalEval (http://127.0.0.1:50602/_anki/jquery.js:2:2662)
at Ha (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:21262)
at n.fn.init.append (http://127.0.0.1:50602/_anki/jquery.js:3:22791)
at n.fn.init. (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:24070)
at Y (http://127.0.0.1:50602/_anki/jquery.js:3:4515)
at n.fn.init.html (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:23660)
at HTMLDivElement. (ht*tp://127.0.0.1:50602/_anki/reviewer.js:33:16)

and this one (probably the same I just realized) for the ones with imagines:
Invalid HTML on card: TypeError: Failed to execute ‘getComputedStyle’ on ‘Window’: parameter 1 is not of type ‘Element’.
TypeError: Failed to execute ‘getComputedStyle’ on ‘Window’: parameter 1 is not of type ‘Element’.
at eval (eval at (http://127.0.0.1:50602/_anki/jquery.js:2:2651), :3:18)
at eval ()
at ht
tp://127.0.0.1:50602/_anki/jquery.js:2:2651
at Function.globalEval (http://127.0.0.1:50602/_anki/jquery.js:2:2662)
at Ha (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:21262)
at n.fn.init.append (http://127.0.0.1:50602/_anki/jquery.js:3:22791)
at n.fn.init. (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:24070)
at Y (http://127.0.0.1:50602/_anki/jquery.js:3:4515)
at n.fn.init.html (ht
tp://127.0.0.1:50602/_anki/jquery.js:3:23660)
at HTMLDivElement. (ht*tp://127.0.0.1:50602/_anki/reviewer.js:33:16)

Please take into account that I don´t understand much of programming yet, so please keep instructions simple. If you wonder about the asteriks,I just put them there because it says I am not allowed to put that many links in.
Thanks for your help guys.
Adrian2210

Please see https://faqs.ankiweb.net/shared-decks-with-broken-javascript.html

Big thanks. You´re a genius, I had that issue for a long time now and didnt know what to do since I couldnt use the app anymore on my computer for japanese and always had to use my phone.
Thanks a lot