Filter field settings greyed out

My data source is MongoDb. I added a filter field to my code below but the filter field settings is greyed out. I would appreciate any help possible why I am unable to add a filter field.
[{$match: {
Mnemonic: {{mnemonic}}
}}, {$sort: {
Session: -1

Image below shows issue:

Hi @njdev
Make sure to select, which table you're querying. Right next to the database selector - GSXC

I experience the same issue when I select the table

@njdev Post "Diagnostic Info" from Admin > Troubleshooting.

"browser-info": {
"language": "en-US",
"platform": "Win32",
"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36",
"vendor": "Google Inc."
"system-info": {
"file.encoding": "UTF-8",
"": "OpenJDK Runtime Environment",
"java.runtime.version": "1.8.0_282-heroku-b08",
"java.vendor": "Oracle Corporation",
"java.vendor.url": "",
"java.version": "1.8.0_282-heroku",
"": "OpenJDK 64-Bit Server VM",
"java.vm.version": "25.282-b08",
"": "Linux",
"os.version": "4.4.0-1088-aws",
"user.language": "en",
"user.timezone": "Etc/UTC"
"metabase-info": {
"databases": [
"hosting-env": "heroku",
"application-database": "postgres",
"application-database-details": {
"database": {
"name": "PostgreSQL",
"version": "13.2 (Ubuntu 13.2-1.pgdg20.04+1)"
"jdbc-driver": {
"name": "PostgreSQL JDBC Driver",
"version": "42.2.18"
"run-mode": "prod",
"version": {
"tag": "v0.39.0.1",
"date": "2021-04-20",
"branch": "release-x.39.x",
"hash": "47bb5f2"
"settings": {
"report-timezone": null

@njdev Upgrade to latest release, 0.39.1

Okay, I will.

@flamber updating Metabase resolved my issue. Thanks!