Decryption help

I’m having issues decrypting messages. This is the error that keeps coming up:

The GPGME library returned an unexpected
error at gpafiledecryptop.c:538. The error was:

No secret key

This is either an installation problem or a bug in GPA.
GPA will now try to recover from this error.

Under the details diagnostics this shows up as well:

[GPA 0.10.0, GPGME 1.15.0, GnuPG 2.2.25]
gpg: encrypted with RSA key, ID 8246F0282CD3E9F6
gpg: decryption failed: No secret key

Please let me know where I am messing up.

Dear Bates,

it maybe that you are trying to decrypt something that was not encrypted to you.
(Technically to the secret key you have access to.)
At least this is what the message implies.

The command line may give you more information, if there is another problem (less likely, but of course possible).

If decrypting with gpa works for you in other cases (and a pinentry comes up),
then it is likely that the first idea is the case, that the file you are trying to decrypt
was just not encrypted to you.

Best Regards,