If you see any of the following issues:
- Imported PGP keys won't save (of they get deleted on app restart)
- Encryption / Decryption error
- Signature verification failure (invalid)
Then it is possible that your keys use an unsupported algorithm.
You check the following article to verify if your key uses a supported algorithm: https://canarymail.zendesk.com/hc/en-us/articles/360046360134-Supported-Unsupported-Encryption-Algorithms-