Mempool - Unable to get UTXO of an address - Endpoint Returning “Cannot GET” Error

Support and Troubleshooting
1

I locally run Bitcoin node + Electrs + mempool.

Every other local endpoint is working fine as it should but address/…/utxo is giving me some strange html response with 404 and I don’t know why.

This is the output:

Error 
Cannot GET /api/v1/address/1KFHE7w8BhaENAswwryaoccDb6qcT6DbYY/utxo