Sync Gateway TimeOut at Launch

My gateway keeps giving me this error:

Timeout 1m15s exceeded -- auth.(*Authenticator).rebuildChannels() at auth.go:176
RebuildChannels returned error: [1080] Timeout 1m15s exceeded --auth(*Authenticator).getPrincipal.func1() at auth.go:119
[ERR] Error opening database db_name: [1080] Timeout 1m15s exceeded

i’ve adjusted both bucket_op_timeout_ms and serverReadTimeout but neither changes the time limit displayed.

Gateway was working well on a single node cluster, then i increased nodes to 3 and added one doc filter to the gateway config, and now i am here. could i please get some help?

This is a portion of my gateway code:
“databases”: {
“db_name”: {
“server”: “###:8091”,
“bucket”: “##”,
“username”: “##”,
“password”: “##”,
“num_index_replicas”: 0,
“enable_shared_bucket_access”: true,
“import_docs”: true,
“users”: {
“#”: {“password”:"#"},
“#”: {“password”:"#"}
“#”: {},
“#”: {}
everything else is port binding and the sync function. this error appears while the CLI console is giving the warning along the lines of “400 _ not allowed in document body”