Trouble with accessing a password-protected ZIP file

I’m using a MacBook Pro with Ventura 13.5, just in case that’s important. A while ago, I created a password-protected ZIP file using the app 'RAR Extractor Unarchiver Pro,' and everything was working fine. I set a 22-character alphanumeric password because those characters were in a document.

Normally, I open the ZIP to check the contents and then delete the extracted files, leaving only the original ZIP. But a few days ago, when I tried to open the ZIP, it said the password was incorrect. This makes no sense because I have the password written down in several places, and I’ve double-checked that I’m typing it correctly. I’ve copied it from different sources and typed it by hand, but it still doesn’t work.

What can I do? I can’t upload the file to a website to try and recover the password because the information inside is sensitive, and I don’t understand what went wrong. Any advice?