My lightning address is dikaios1517@getalby.com, and nope, that does not work for getting an invoice, either after updating it to "https://getalby.com/lnurlp/dikaios1517/callback?amount=1000"
What's your Alby lightning address? Can you get an invoice from https://getalby.com/lnurlp/[name]/callback?amount=1000 ?
Discussion
Can you contact us at support.getalby.com and describe your setup Alby Hub / LNBits / funding source shortly? Happy to help via DM.