Can't authorize on Win7 E_AUTH_INVALID_KEY_DATA bad padding

Hey Adobe, why is this still an issue? Seriously since 2013 people have to sacrifice security to use this product! It's 2020 now and I faced this issue just now.

The solution was to have a shorter password, that shouldn't be a solution!

Preface: I know this thread is old, but I'm replying here because it's the #1 Google hit for the error.

I was receiving this error across multiple devices AND accounts. The common thread turned out to be my very long passwords (I use keychain software instead of trying to remember/type them manually.) Once I reduced my password from my usual 100 chars to a more manageable 12, the issue cleared up immediately and I was able to log in.

I'm having the same problem.

ETA: Try using ADE 1.7 (you can find it here). It worked for me.

I'm afraid I don't think this suggestion will work in your case, but probably worth a try anyway ...

Sometimes ADE gets its registration/activation confused and in a semi-authorized state.

Unfortunately, it often then gives misleading error messages about what is wrong.

Try completely removing any authorization using ctrl-shift-D to ADE (cmd-shift-D if on Mac).

Restart ADE, and then reauthorize with your Adobe ID.