Hi ware55.
"what can i do?"
Get the Masterkey of your phone and decrypt it.
Use bash openssl and this (decrypted) key to decrypt your WiFi passwords.
But it isn't an easy way and differs in the different versions of ANDROID as you can read here:
https://source.android.com/security/encr.../full-disk
Your example is from 2015 and since this time without a solution, although the plaintext (77807780) is published, too.
Some app programmers tried to apply it to their key recovery tools, but they failed:
https://github.com/bparmentier/WiFiKeyShare/issues/15
You should consider to install TWRP (https://twrp.me/Devices/) and LINEAGE (https://www.lineageos.org/) on your device.
"what can i do?"
Get the Masterkey of your phone and decrypt it.
Use bash openssl and this (decrypted) key to decrypt your WiFi passwords.
But it isn't an easy way and differs in the different versions of ANDROID as you can read here:
https://source.android.com/security/encr.../full-disk
Your example is from 2015 and since this time without a solution, although the plaintext (77807780) is published, too.
Some app programmers tried to apply it to their key recovery tools, but they failed:
https://github.com/bparmentier/WiFiKeyShare/issues/15
You should consider to install TWRP (https://twrp.me/Devices/) and LINEAGE (https://www.lineageos.org/) on your device.