Indexing issue when accessing parameter in object that's typed

[reef blaze]

I have this problem where i'm getting:
"No index signature with a parameter of type 'string' was found on type", where i'm trying to access a nested object that's typed. I've tried every combination of "keyof typeof" solution i can google, but nothing has worked. It feels like i'm missing something since it shouldn't be this hard to manipulate and the contents of an object.

[meager pecan]

Post code. Read #how-to-get-help

[reef blaze]

Sorry, made a tiny mockup of my problem here:
https://www.typescriptlang.org/play?#code/JYOwLgpgTgZghgYwgAgCIQG7Ccg3gKGWWAAcAuZAZzClAHMBuQ5EKC62kR5y6YOADbsa9JkQQB7EDGB0AcnAC2EYZ27ipMuhQDCm2WOSTpsgBJxKpiAJLQAYgFcQCCgCMJEgRDghDAC2tbKEdnMGApSgoAQSgoOABPAB4rG3snBAA+ZjgSEgBJABNVUWYJBzAvMEKAeRAVKhEuQzKKiCqCgBUAdwlipuY6CDq4yAAZbCHeNw8vH0NjLQcoCCLkd09vX3wAX3x8BAELSmQ8kGAwuEgC9CwcYEUSL2VwY5uJvGZSZABeZAByP6GVg-f6Anh8QQggHzfTyJQoX5-ADKYB8BTgUAKYI0JjoILqXWQelxMNx5ksgTSzhB8AEvH8lOC6TCEXxEEJMTiSRSQRCmQAFABKQw5fIFKHY5AtSo1OoS5rlGWdHrygZDaCXCDjJAgXg0wT05gLWRLFb6ukQJi7faHSjHHlUhAfIgFCCUBC0EgskBQjpusCSgDWEHiAEYoQBxdVxARBkMAJihcRABQkiklIHhSbRaclEi94V1IIA2gCALqGMDxWyqogYQQOBH-AnIesCRtg3agSCwRAoYmLEaF53-KPDQR-CgEIi7Ih-V2uBx0Scj7aGeeYaz554BqfMNfMP7d6DwJAr6fIA9ziQIXLn-fr6Vte8z9ckejLda71dvqASGReC+l7rsshzxEBV7-A4wAQVaTA2kcRKwsQDxPEMYDHAOJpDlII5jhqAgghekELkuREPswroYFuJA7uRr6fOAJ59vRwGlLeJCsZBT5gFxhjvlwn4eLxvzEfxf4AU2YnMKBCR8cw0HydalTIFR7y-C2pznPwVxvEgTAqQEqRMqEw4aeyyAOiZCBMGpSAAHTGnQxZGbyzKFvZwZhmWQA

[meager pecan]

key1 is a string. It needs to have a more precise type, telling TypeScript that it is a key of the Configuration interface (since that's what you use it for): key1: keyof Configuration = 'General';